[Blackbird0]

I just downloaded an EPUB without DRM from Kobo. When I try to load it into Calibre, I get the following error:

calibre, version 2.40.0
ERROR: Errors while adding: Failed to add any books, click "Show details" for more information


----------------------------------------------------------------------
Failed to add the book: Shadows of Self
/Users/blackbirdiii/Downloads/macmillan_drmfree-epub-6c39f315-fca0-45d9-90da-a99ca1233265.epub
With error:
Traceback (most recent call last):
File "site-packages/calibre/gui2/add.py", line 369, in add_book
File "site-packages/calibre/db/legacy.py", line 214, in create_book_entry
File "site-packages/calibre/db/cache.py", line 57, in call_func_with_lock
File "site-packages/calibre/db/cache.py", line 1504, in create_book_entry
File "site-packages/calibre/db/cache.py", line 1237, in set_metadata
File "site-packages/calibre/db/cache.py", line 1064, in update_path
File "site-packages/calibre/db/backend.py", line 1496, in update_path
File "lib/python2.7/os.py", line 157, in makedirs
OSError: [Errno 13] Permission denied: '/Users/blackbirdiii/Calibre Library/Brandon Sanderson/Shadows of Self (1036)'


I'm running Mac OC El Capitan, and 2.40 Calibre.