I am wondering if I am posting in the wrong place about LR book module problems? Is there a better forum for my questions? Thanks.
No one has replied yet so I posted on photo.net also. Still no replies there either. I did some searching with Google trying to find an answer and in the process I discovered a Lightroom blog by Julieanne Kost, an Adobe employee. I sent her an email, but just got an automatic reply saying she didn't have time to answer questions and suggested I post in this very forum because it is "frequented by members of the product development team as well as other passionate users willing to share their expertise and experience."
I have the same problem too. it just keeps happening. I add text and Lightroom 5.6 loses all my text changes!
It's an absolute waste of time, effort and inspiration - and (according to Google) it's been an on-going problem ever since the Book module first appeared. Unbelievable that Adobe haven't fixed it. Just the fact that Lightroom doesn't have the security of a normal save dialog means users have to just trust that Lightroom will protect all their hard work - and it won't. I warn you. Do NOT trust Lightroom. Use a less dumbed-down program instead where you can at least save your changes.
I'm ditching Lightroom and am going to create my books in InDesign. Surely, that program works...