Why are my EPUB books appearing under Audiobooks?

I'm having this problem as well - any advice?

Yeah I'm getting this. All my books are showing normally in iBooks but in iTunes about 200 are classified as audiobooks and when synced to my iPad nothing appears except for the books classified as books in iTunes. What is going on this is a serious bug?

Clearly a very serious bug. Wasted hours trying to straighten this out - can't be fixed by us mere mortals. Come on Apple, fix it!

I'm also having this problem. Has anybody found a solution?

Here is a temporary solution:

In iTunes, select each ebook that's misclassified as an audiobook and do a command-I to Get Info. iTunes will recognize that the file is an ebook and it will disappear from iTunes. Once all of your ebooks are removed from the audiobook list, you can sync to your iPad and the books will appear properly.

However, there are two bad things about this solution:

1. You have to do this Get Info one book at a time; it doesn't work if you select more than one at once.

2. Much worse, if you quit and restart iTunes after doing this, all those ebooks will be back under audiobooks again. So be sure to turn off automatic syncing once everything's where you want it on your iPad.

I was hoping that 12.3 would fix this problem, but no dice...

A quicker way to do many books is to change to list view and after you highlight the first book and type ⌘I (Get Info), Type ⌘N (Next) continuously. That will do them all, albeit one at a time.

But isn't this all stupid! C'mob Apple fix the **** bug!

Now for another: I have 1034 books. Before the recent series of OS X and iTunes updates all books would sync to my iPad. Now, no matter what I do, only a reduced number will sync. I can no longer sync all the books - despite plenty of free space on the iPad. Anyone run into that?

I also have been having this problem: I had 490 books in iBooks, but only 472 would sync with iTunes. I noticed that when I changed a few covers of different books (they didn't have cover art, etc) those books then weren't able to sync. My attempt to fix the problem: I backed up the ibooks, deleted them off my Macbook, then tried putting just one back in ibooks. That book will not show up in sync.

After reading this thread, I see that it does show up as an audiobook. I am a little concerned that anytime I want to add a new book (or sync anything for that matter) I am going to have to go through the whole temporary "get info" fix. Time for Apple to fix this!

I am also having this problem, very annoying. Appears to happen to epub books that are not from the Apple store. A real solution would be greatly appreciated. Has anyone formally reported this as a bug to Apple?

I've filed a bug report for this, as it is clearly reproducible, and my Apple developer annual payment has to be worth something. Bug number 22822499. I referred to this community thread in the description.

Same issue here! Could not find a solution besides the already mentioned "Get Info". Very strange, very nasty as we all have to do this every time we want to sync...

Having the exact same issue. I ended up dropping the files onto iCloud Drive or Dropbox and then using the app on iOS to load/import them.

I've been very disappointed ever since books were taken out of iTunes. Keeping everthing together would not only have made management of my book library easier but likely also brought double-click to read functionality to Windows users as well.