iBook books keep getting removed from iPhone after syncing

[macattack4]

I want to keep all of my books on my iPhone at all times.

However, sometimes when I plug in my iPhone to my Macbook (primarily just to charge my phone or sync my music), my sync books settings some how change and then later when I open iBooks on my phone I realize no books or some books are there.

How do I make sure "All Books" is always selected by default unless I explicitly want to change it? Don't get why it doesn't stay that way.

http://i.imgur.com/ynuGYPx.png

 

[Leney]

This is happening to me too. Selecting "All books" in the books syncing tab of an iPhone or iPad should be sufficient for all books to be synced and to say synced. But there seems to be some sort of bug in iTunes or perhaps the iBooks app. I've had this issue for a while (with different iOS and iTunes versions) - reoccurring every few months. Recently it's happened twice in a 3 day period. In fact, right now I'm resyncing 750+ books to my iPad. I've searched for help on the issue but have never seen anything on point; tried restoring the device; hard resetting device; rebooting computer - nothing's helped.

To reiterate the issue - all books (or even less) were selected to be synced to the device, and are on the device; in another instance, when connecting the device to my computer, the books settings on my device now says the number of selected books is zero or one; if I reselect all books or make a number of selections, the sync process remove the books that it didn't recognize and then proceeds to reinstall them based on my selection. It's annoying. Using up to date iTunes and iOS versions. Computer with Windows 8.1.

 

[TRDmanAE86]

Which iTunes is this? is it 11.4 or 12?

 

[macattack4]

Just happened to me again. This is on iTunes 12.