[eXistenZ]

It's even stranger, because that book "Tvtti i trionfi, carri, mascheaate ò canti carnascialeschi..." is not in my kobo, neither in the Calibre library.
I don't remember for sure, but I think I downloaded it months ago for a research, directly from kobo and then deleted it. (EDIT, maybe i downloaded it from elsewere, because it is not in my kobo desktop library)

Anyway I tryed the debug mode as you said, here it is the result.

Spoiler:

2014-12-18 17:24:53.276 calibre-debug[4933:507] CoreText performance note: Client called CTFontCreateWithName() using name "Helvetica" and got font with PostScript name "Helvetica-Black". For best performance, only use PostScript names when calling this API.
2014-12-18 17:24:53.276 calibre-debug[4933:507] CoreText performance note: Set a breakpoint on CTFontLogSuboptimalRequest to debug.
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
libpng warning: iCCP: Not recognizing known sRGB profile that has been edited
calibre Log di debug
calibre 2.12 isfrozen: True is64bit: True
Darwin-13.4.0-x86_64-i386-64bit Darwin ('64bit', '')
('Darwin', '13.4.0', 'Darwin Kernel Version 13.4.0: Sun Aug 17 19:50:11 PDT 2014; root:xnu-2422.115.4~1/RELEASE_X86_64')
Python 2.7.8
OSX: ('10.9.5', ('', '', ''), 'x86_64')
Successfully initialized third party plugins: DeDRM && ANOBII && KePub Output && Anobii Fetcher && Count Pages && Modify ePub && Annotations && KoboTouchExtended && Kobo Utilities && INMONDADORI
Starting up...
DEBUG: 0.0 KoboUtilites::action.py - loading translations
DEBUG: 0.0 KoboUtilites::dialogs.py - loading translations
DEBUG: 0.0 KoboUtilites::action.py - loading translations
DEBUG: 1.3 No Kobo Touch, Glo or Mini appears to be connected
DEBUG: 1.3 rebuild_menus - have device.
DEBUG: 1.3 rebuild_menus - self.supports_ratings=False
Key u'A' for shortcut Apri la cartella contenente is already used by Aggiungi libri, ignoring
Key u'A' for shortcut Apri la cartella contenente is already used by Aggiungi libri, ignoring
2014-12-18 17:24:56.040 calibre-debug[4933:507] Error loading /Library/ScriptingAdditions/QXPScriptingAdditions.osax/Contents/MacOS/QXPScriptingAdditions: dlopen(/Library/ScriptingAdditions/QXPScriptingAdditions.osax/Contents/MacOS/QXPScriptingAdditions, 262): no suitable image found. Did find:
/Library/ScriptingAdditions/QXPScriptingAdditions.osax/Contents/MacOS/QXPScriptingAdditions: mach-o, but wrong architecture
calibre-debug: OpenScripting.framework - scripting addition "/Library/ScriptingAdditions/QXPScriptingAdditions.osax" declares no loadable handlers.
2014-12-18 17:24:59.584 Calibre[4948:507] deliverNotificationWithTitle()
* Notification delivered.
DEBUG: 5.7 KoboUtilities:_on_device_connection_changed - self.plugin_device_connection_changed.__class__: <type 'PyQt5.QtCore.pyqtBoundSignal'>
DEBUG: 5.7 Methods for self.plugin_device_connection_changed: ['__call__', '__class__', '__delattr__', '__doc__', '__format__', '__getattribute__', '__getitem__', '__hash__', '__init__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', 'connect', 'disconnect', 'emit', 'signal']
Job: 1 Recupera informazioni sul dispositivo started
DeviceJob: 1 Recupera informazioni sul dispositivo done, calling callback
DeviceJob: 1 Recupera informazioni sul dispositivo callback returned
Job: 2 Imposta informazioni sulla biblioteca started
DeviceJob: 2 Imposta informazioni sulla biblioteca done, calling callback
DeviceJob: 2 Imposta informazioni sulla biblioteca callback returned
Job: 3 Recupera la lista dei libri del dispositivo started
DEBUG: 0.0 KoboTouch:books - oncard='None'
DEBUG: 0.0 KoboTouch:books - oncard='None', prefix='/Volumes/KOBOeReader/'
DEBUG: 0.0 Kobo device: Kobo Aura HD
DEBUG: 0.0 Version of driver: (2, 2, 20) Has kepubs: True
DEBUG: 0.0 Version of firmware: (3, 12, 0) Has kepubs: True
DEBUG: 0.0 Firmware supports cover image tree: True
DEBUG: 0.0 KoboTouch:books - opts.extra_customization= [u'#scaffale, #collana', True, True, True, True, True, True, False, True, True, False, True, u'Tvtti', True, False, True, True, True, True, False, u'', False]
DEBUG: 0.0 KoboTouch:books - prefs['manage_device_metadata']= manual
DEBUG: 0.0 KoboTouch:books - set_debugging_title to 'Tvtti'
DEBUG: 0.0 KoboTouch:books - length bl=0
Job: 1 Recupera informazioni sul dispositivo finished
Nessun dettaglio disponibile.
Job: 2 Imposta informazioni sulla biblioteca finished
Nessun dettaglio disponibile.
Started up in 9.57 seconds with 3868 books
DEBUG: 4.2 KoboTouch:books - length bl after sync=1793
DEBUG: 4.2 KoboTouch:books - reading device database
DEBUG: 4.2 Database Version=111
DEBUG: 4.2 KoboTouch:books - query= SELECT Title, Attribution, DateCreated, ContentID, MimeType, ContentType, ImageID, ReadStatus, ___ExpirationStatus, FavouritesIndex, Accessibility, IsDownloaded, Series, SeriesNumber, ___UserID, ExternalId FROM content where BookID is Null and ((Accessibility = -1 and IsDownloaded in ('true', 1 )) or (Accessibility in (1,2) ) or (Accessibility in (-1, 4, 6) and ___UserId = '') ) and not ((___ExpirationStatus=3 or ___ExpirationStatus is Null) and ContentType = 6) AND (externalId IS NULL OR externalId = '') AND contentId NOT LIKE 'file:///mnt/sd/%'
DEBUG: 8.1 KoboTouch:books - looping on database - row=1786
DEBUG: 8.1 KoboTouch:books - title='Tvtti i trionfi, carri, mascheaate ò canti carnascialeschi andati per Firenze, dal te[m]po del…' authors= Anton Francesco Grazzini,Anton Francesco Grazzini,Medici, Lorenzo de'. Trionfo di Bacco, e Darianna
DEBUG: 8.1 KoboTouch:books - row= (u'Tvtti i trionfi, carri, mascheaate \xf2 canti carnascialeschi andati per Firenze, dal te[m]po del\u2026', u"Anton Francesco Grazzini,Anton Francesco Grazzini,Medici, Lorenzo de'. Trionfo di Bacco, e Darianna", u'2010-01-02T03:36:57.001', u'7221b840-4043-4ee6-abb7-71ffcb8ba8bf', u'application/epub+zip', u'6', u'AAAAAAAAAAAAAAAAAAAAAA', 0, 0, -1, 2, u'true', None, None, u'db018bc8-0102-4b38-adcb-2470ff56aae9', u'')
DEBUG: 8.1 KoboTouch:books - path='7221b840-4043-4ee6-abb7-71ffcb8ba8bf' ContentID='7221b840-4043-4ee6-abb7-71ffcb8ba8bf' externalId=
DEBUG: 8.1 KoboTouch:update_booklist - title='Tvtti i trionfi, carri, mascheaate ò canti carnascialeschi andati per Firenze, dal te[m]po del…' ContentType=6 isdownloaded= true
DEBUG: 8.1 prefix=/Volumes/KOBOeReader/, mime=application/octet-stream, date=2010-01-02T03:36:57.001, readstatus=0, MimeType=application/epub+zip, expired=0, favouritesindex=-1, accessibility=2, isdownloaded=true
DEBUG: 8.1 KoboTouch:update_booklist - playlist_map= {u'': []}
DEBUG: 8.1 Traceback (most recent call last):
File "site-packages/calibre/devices/kobo/driver.py", line 1603, in update_booklist
File "site-packages/calibre/devices/kobo/driver.py", line 718, in book_from_path
File "site-packages/calibre/devices/kobo/books.py", line 27, in __init__
File "site-packages/calibre/devices/usbms/books.py", line 39, in __init__
File "site-packages/calibre/ebooks/metadata/book/base.py", line 786, in __nonzero__
File "site-packages/calibre/ebooks/metadata/book/base.py", line 149, in __getattribute__
AttributeError: Metadata object has no attribute named: 'author'
KoboTouch:update_booklist - idx is none
DEBUG: 8.1 KoboTouch:update_booklist - exception creating book: 'Metadata object has no attribute named: 'author''
DEBUG: 8.1 prefix: /Volumes/KOBOeReader/ lpath: title: Tvtti i trionfi, carri, mascheaate ò canti carnascialeschi andati per Firenze, dal te[m]po del… authors: Anton Francesco Grazzini,Anton Francesco Grazzini,Medici, Lorenzo de'. Trionfo di Bacco, e Darianna mime: application/octet-stream date: 2010-01-02T03:36:57.001 ContentType: 6 ImageID: AAAAAAAAAAAAAAAAAAAAAA
DEBUG: 8.3 KoboTouch:books - about to sync_booklists
DEBUG: 8.3 USBMS: starting sync_booklists
DEBUG: 11.6 USBMS: finished sync_booklists
DEBUG: 11.6 KoboTouch:books - have done sync_booklists
DEBUG: 11.6 KoboTouch:books - end - oncard='None'
DEBUG: 11.6 KoboTouch:books - oncard='carda'
DEBUG: 11.6 KoboTouch:books - oncard='carda', prefix='/Volumes/SENZATITOLO/'
DEBUG: 11.6 Kobo device: Kobo Aura HD
DEBUG: 11.6 Version of driver: (2, 2, 20) Has kepubs: True
DEBUG: 11.6 Version of firmware: (3, 12, 0) Has kepubs: True
DEBUG: 11.6 Firmware supports cover image tree: True
DEBUG: 11.6 KoboTouch:books - opts.extra_customization= [u'#scaffale, #collana', True, True, True, True, True, True, False, True, True, False, True, u'Tvtti', True, False, True, True, True, True, False, u'', False]
DEBUG: 11.6 KoboTouch:books - prefs['manage_device_metadata']= manual
DEBUG: 11.6 KoboTouch:books - set_debugging_title to 'Tvtti'
DEBUG: 11.6 KoboTouch:books - length bl=0
DEBUG: 11.7 KoboTouch:books - length bl after sync=44
DEBUG: 11.7 KoboTouch:books - reading device database
DEBUG: 11.7 Database Version=111
DEBUG: 11.7 KoboTouch:books - shelf list: [u'Manga']
DEBUG: 11.7 KoboTouch:books - query= SELECT Title, Attribution, DateCreated, ContentID, MimeType, ContentType, ImageID, ReadStatus, ___ExpirationStatus, FavouritesIndex, Accessibility, IsDownloaded, Series, SeriesNumber, ___UserID, ExternalId FROM content where BookID is Null and ((Accessibility = -1 and IsDownloaded in ('true', 1 )) or (Accessibility in (1,2) ) or (Accessibility in (-1, 4, 6) and ___UserId = '') ) and not ((___ExpirationStatus=3 or ___ExpirationStatus is Null) and ContentType = 6) AND (externalId IS NOT NULL AND externalId <> '' OR contentId LIKE 'file:///mnt/sd/%')
DEBUG: 11.8 KoboTouch:books - about to sync_booklists
DEBUG: 11.8 USBMS: starting sync_booklists
DEBUG: 11.9 USBMS: finished sync_booklists
DEBUG: 11.9 KoboTouch:books - have done sync_booklists
DEBUG: 11.9 KoboTouch:books - end - oncard='carda'
DEBUG: 11.9 KoboTouch:books - oncard='cardb'
DEBUG: 11.9 KoboTouch:books - Asked to process 'cardb', but do not have one!
DeviceJob: 3 Recupera la lista dei libri del dispositivo done, calling callback
DeviceJob: metadata_downloaded: Starting set_books_in_library
DeviceJob: set_books_in_library: books to process= 1837
DeviceJob: set_books_in_library finished: time= 0.0483119487762
DeviceJob: metadata_downloaded: updating views
DeviceJob: metadata_downloaded: syncing
DeviceJob: metadata_downloaded: refreshing ondevice
DeviceJob: metadata_downloaded: sending metadata_available signal
DEBUG: 18.3 KoboUtilities:_on_device_metadata_available - Metadata available: {'A': {u'device_name': u'Kobo Aura HD', u'prefix': '/Volumes/SENZATITOLO/', u'last_library_uuid': None, u'calibre_version': u'2.12.0', u'device_store_uuid': u'4542f3c9-1a5b-47e0-8451-a8d3933970f9', u'location_code': 'A', u'date_last_connected': u'2014-12-18T16:24:59.548848+00:00'}, 'main': {u'device_name': u'Kobo Aura HD', u'prefix': '/Volumes/KOBOeReader/', u'last_library_uuid': None, u'calibre_version': u'2.12.0', u'device_store_uuid': u'1fddf96b-23a6-412b-9922-f2dec137bf48', u'location_code': 'main', u'date_last_connected': u'2014-12-18T16:24:59.541905+00:00'}}
DEBUG: 18.3 Have a Kobo device connected connected
DEBUG: 18.3 KoboUtilites:_on_device_metadata_available - About to start auto backup
DEBUG: 18.3 auto_backup_device_database - start
DEBUG: 18.3 BEGIN Get Device Path
DEBUG: 18.3 Root path2014-12-18 17:25:12.241 Calibre[4954:507] deliverNotificationWithTitle()
* Notification delivered.
2014-12-18 17:25:30.574 Calibre[4959:507] deliverNotificationWithTitle()
of device: /Volumes/KOBOeReader/
DEBUG: 18.3 END Get Device Path
DEBUG: 18.3 auto_backup_device_database - destination directory= /Users/existenz/Web/DB backup
DEBUG: 18.3 auto_backup_device_database - version_info= ['N204B3A313929', '2.6.35.3', '3.12.0', '2.6.35.3', '2.6.35.3', '00000000-0000-0000-0000-000000000350']
DEBUG: 18.3 auto_backup_device_database - device_information= ('Kobo Aura HD', '', '', '', {'A': {u'device_name': u'Kobo Aura HD', u'prefix': '/Volumes/SENZATITOLO/', u'last_library_uuid': None, u'calibre_version': u'2.12.0', u'date_last_connected': u'2014-12-18T16:25:12.123079+00:00', u'location_code': 'A', u'device_store_uuid': u'4542f3c9-1a5b-47e0-8451-a8d3933970f9'}, 'main': {u'device_name': u'Kobo Aura HD', u'prefix': '/Volumes/KOBOeReader/', u'last_library_uuid': None, u'calibre_version': u'2.12.0', u'date_last_connected': u'2014-12-18T16:25:12.121533+00:00', u'location_code': 'main', u'device_store_uuid': u'1fddf96b-23a6-412b-9922-f2dec137bf48'}})
DEBUG: 18.3 auto_backup_device_database - device_name= KoboAuraHD
DEBUG: 18.3 auto_backup_device_database - backup_file_template= KoboReader-KoboAuraHD-N204B3A313929-
DEBUG: 18.3 auto_backup_device_database - backup_options= {'device_name': 'KoboAuraHD', 'database_file': u'/Volumes/KOBOeReader/.kobo/KoboReader.sqlite', 'serial_number': 'N204B3A313929', 'backup_file_template': 'KoboReader-{0}-{1}-{2}', u'backupEachCOnnection': False, u'backupCopiesToKeepSpin': 4, u'doDailyBackp': True, u'backupDestDirectory': u'/Users/existenz/Web/DB backup', 'device_path': '/Volumes/KOBOeReader/'}
DEBUG: 18.3 KoboUtilitiesAction::_firmware_update
DEBUG: 18.3 auto_backup_device_database - end
DEBUG: 18.3 KoboUtilites:_on_device_metadata_available - About to start auto store
DEBUG: 18.3 auto_store_current_bookmark - start
DEBUG: 18.3 Have a Kobo device connected connected
DEBUG: 18.3 BEGIN Get Device Path
DEBUG: 18.3 Root path of device: /Volumes/KOBOeReader/
DEBUG: 18.3 END Get Device Path
DEBUG: 18.3 QueueProgressDialog::__init__
DEBUG: 18.4 QueueProgressDialog::do_books - Start
DEBUG: 18.4 QueueProgressDialog::do_books - kobo_percentRead_column= #percread
DEBUG: 18.4 QueueProgressDialog::do_books - search_condition= ondevice:True and (#percread:false or #percread:<100)
Job: 3 Recupera la lista dei libri del dispositivo finished
Nessun dettaglio disponibile.
DEBUG: 36.6 QueueProgressDialog::do_books - Finish
DEBUG: 36.6 QueueProgressDialog::do_queue
DEBUG: 36.6 KoboUtilitiesAction::_store_queue_job
DEBUG: 36.7 Have a Kobo device connected connected
DEBUG: 36.7 rebuild_menus - have device.
DEBUG: 36.7 rebuild_menus - self.supports_ratings=True
Key u'A' for shortcut Apri la cartella contenente is already used by Aggiungi libri, ignoring
DeviceJob: 3 Recupera la lista dei libri del dispositivo callback returned
Job: 4 Backing up Kobo device database started
DEBUG: 0.0 do_device_database_backup - start
DEBUG: 0.0 do_device_database_backup - backup_options= {'device_name': 'KoboAuraHD', 'database_file': u'/Volumes/KOBOeReader/.kobo/KoboReader.sqlite', 'serial_number': 'N204B3A313929', 'backup_file_template': 'KoboReader-{0}-{1}-{2}', u'backupEachCOnnection': False, u'backupCopiesToKeepSpin': 4, u'doDailyBackp': True, u'backupDestDirectory': u'/Users/existenz/Web/DB backup', 'device_path': '/Volumes/KOBOeReader/'}
DEBUG: 0.0 do_device_database_backup - copies_to_keep= 4
DEBUG: 0.0 do_device_database_backup - backup_file_search= KoboReader-KoboAuraHD-N204B3A313929-20141218-[0-9][0-9][0-9][0-9][0-9][0-9].sqlite
DEBUG: 0.0 do_device_database_backup - backup_file_search= /Users/existenz/Web/DB backup/KoboReader-KoboAuraHD-N204B3A313929-20141218-[0-9][0-9][0-9][0-9][0-9][0-9].sqlite
DEBUG: 0.0 do_device_database_backup - backup_files= [u'/Users/existenz/Web/DB backup/KoboReader-KoboAuraHD-N204B3A313929-20141218-170941.sqlite']
DEBUG: 0.0 auto_backup_device_database - Backup already done today
DeviceJob: 4 Backing up Kobo device database done, calling callback
DeviceJob: 4 Backing up Kobo device database callback r* Notification delivered.
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry
void QCocoaWindow::syncWindowState(Qt::WindowState) invalid window content view size, check your window geometry

I also sent a PM for the DB