Identifying source of old EPUB file?

jpfromct · 10-21-2015, 09:39 AM

Hi folks. I have an EPUB book that I bought from somewhere several years ago (maybe 2011)? I'm trying to figure out the source so that I can de-drm it properly. I have ruled out Amazon, Barnes & Noble, Apple iBooks and Kobo books. When I try to import it to Adobe Digital Edition, it tells me that "This computer is not authorized to open [book name] because this item is authorized to a vendor ID". But none of the vendors shown look familiar to me.

Any thoughts on how I can track down the source?

Thanks!

JSWolf · 10-21-2015, 09:44 AM

Look inside the ePub and look at the OPF. Sometimes the OPF has the vendor listed like Sony or Google.

jpfromct · 10-21-2015, 10:01 AM

Thanks for your quick reply. I opened the epub file using Text Edit and I didn't see OPF anywhere? Is there another way to "look inside" the file?

I did see a bunch of stuff that seemed to reference Adobe:

Quote:

urn:uuid:5e575b6c-38c0-4659-8a52-4e3896a63d73 urn:uuid:58ab3f77-369f-4857-a7ee-163c5ff6883f application/epub+zip standalone urn:uuid:4dab8e30-9e5f-4638-92ac-c1c376bfc95c ContentReserveID:84A1A1C5-DF9D-4FF3-8D6F-7E8219167BD5-410 https://nasigningservice.adobe.com/licensesign http://acsepub.contentreserve.com/fulfillment

AnemicOak · 10-21-2015, 10:13 AM

Quote:

Originally Posted by jpfromct

Thanks for your quick reply. I opened the epub file using Text Edit and I didn't see OPF anywhere? Is there another way to "look inside" the file?

I did see a bunch of stuff that seemed to reference Adobe:

Change the .epub extension to .zip and open it that way then you'll be able to see the file structure inside the ePub package.

theducks · 10-21-2015, 10:36 AM

U (for unpack), then Explode (use your favorite TXT editor to peek at the OPF or other files)

Just don't Rebuild and nothing changes (if you choose to rebuild. Know what you are doing

)

Abort (cancel) and it will close the File Explorer window

jhowell · 10-21-2015, 11:17 AM

Quote:

urn:uuid:5e575b6c-38c0-4659-8a52-4e3896a63d73 urn:uuid:58ab3f77-369f-4857-a7ee-163c5ff6883f application/epub+zip standalone urn:uuid:4dab8e30-9e5f-4638-92ac-c1c376bfc95c ContentReserveID:84A1A1C5-DF9D-4FF3-8D6F-7E8219167BD5-410 https://nasigningservice.adobe.com/licensesign http://acsepub.contentreserve.com/fulfillment

"ContentReserveID" is the identifier used by OverDrive. Could it have been a library book?

jpfromct · 10-21-2015, 11:20 AM

Thanks everyone. I did manage to "unpack" the book and find the .opf file, but I didn't see anything useful there. BUT jhowell, I think you might be on to something - maybe it was a library book! Will check this further. If it was a library book, then I will need to go purchase it. Thank you!

AnemicOak · 10-21-2015, 11:22 AM

Quote:

Originally Posted by jhowell

"ContentReserveID" is the identifier used by OverDrive.

Fictionwise (for a while, but it might have stopped before ePub?) and Books on Board also used OverDrive.

jpfromct · 10-21-2015, 11:42 AM

OK. I'm pretty sure it was a library book. Don't know how it got mixed in with my other files.... but at least I know why it wasn't opening!

Thanks so much to all who chimed in!

10-21-2015, 09:39 AM	#1
jpfromct Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: Kindle	Identifying source of old EPUB file? Hi folks. I have an EPUB book that I bought from somewhere several years ago (maybe 2011)? I'm trying to figure out the source so that I can de-drm it properly. I have ruled out Amazon, Barnes & Noble, Apple iBooks and Kobo books. When I try to import it to Adobe Digital Edition, it tells me that "This computer is not authorized to open [book name] because this item is authorized to a vendor ID". But none of the vendors shown look familiar to me. Any thoughts on how I can track down the source? Thanks!

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10-21-2015, 09:44 AM	#2
JSWolf Resident Curmudgeon Posts: 79,408 Karma: 145491800 Join Date: Nov 2006 Location: Roslindale, Massachusetts Device: Kobo Libra 2, Kobo Aura H2O, PRS-650, PRS-T1, nook STR, PW3	Look inside the ePub and look at the OPF. Sometimes the OPF has the vendor listed like Sony or Google.

10-21-2015, 10:36 AM	#5
theducks Well trained by Cats Posts: 30,939 Karma: 60358908 Join Date: Aug 2009 Location: The Central Coast of California Device: Kobo Libra2,Kobo Aura2v1, K4NT(Fixed: New Bat.), Galaxy Tab A	U (for unpack), then Explode (use your favorite TXT editor to peek at the OPF or other files) Just don't Rebuild and nothing changes (if you choose to rebuild. Know what you are doing ) Abort (cancel) and it will close the File Explorer window

10-21-2015, 11:20 AM	#7
jpfromct Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: Kindle	Thanks everyone. I did manage to "unpack" the book and find the .opf file, but I didn't see anything useful there. BUT jhowell, I think you might be on to something - maybe it was a library book! Will check this further. If it was a library book, then I will need to go purchase it. Thank you!

10-21-2015, 11:42 AM	#9
jpfromct Junior Member Posts: 4 Karma: 10 Join Date: Oct 2015 Device: Kindle	OK. I'm pretty sure it was a library book. Don't know how it got mixed in with my other files.... but at least I know why it wasn't opening! Thanks so much to all who chimed in!

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