Originally Posted by keys1998

Some of the books are in ePub format that I imported after purchasing from Barnes and noble. Could that be the issue? If so, any ideas on how to fix it? I have quite a few books that were not purchased thru iTunes and would like to have them on my iPad.

If I may add...

The odds are pretty good that any book you download from a store other than Apple's (such as Barnes & Noble, in this case) will not work in iBooks. This is because of Digital Rights Management (DRM) restrictions, not iOS 5 updates. With DRM, each major store "protects" their books so that they can only be read on that store's e-reader device or app.

The only suggestion in this case is to use an e-reader or app that Barnes & Noble supports. I think it's the Nook, right? But - with DRM, they'll never work in iBooks.

Welcome to e-books and publishers and DRM...

Marilyn

Thank you for this post!!!! Finally!!! I updated the iBooks app on my iPad by doing the above and this worked!!! Thank you
Again! My response is to Reynolds post.

I use a free program called e-calibre. It is a free download that converts various formats for e readers. My experience is with ePub files. I cam convert them to mobi files for kindle, as well. In that program I open the ePub docs and drag and drop into iTunes. Then sync iTunes. It worked after I removed the books and re did. It.

Originally Posted by keys1998

I am also having a problem. After updating to ios5, my books are gone. I have tried to sync and all to no avail. Any ideas on how to fix this?

I went through all the steps as described in this thread and nothing worked. Finally, I deleted the iBooks app and then downloaded it again and it fixed it...

Hi iPad specialist,

My name is Henk, living in the Netherlands, working for the Ministry of Economic Affairs, Agriculture and Innovations.
After downloading iOS 5.0 recently I have problems with iBooks as discribed in the various topics. I have followed the different options as
advised, however the problem is not solved and my libary is still empty. Opening the iBooks via the App I see my empty libary for 5 seconds and than it is closing again. I very much hope you can give me advice to solve this problem with iBooks.
Thank you so much from the Netherlands.


Problem solved after running a full restore on advice from Apple Support. (December 30, 2011)