Just recently the default setting when exporting a .pdf from InDesign has switched from Adobe PDF (Print) to Adobe PDF (Interactive). Is there any way to switch the default to be Adobe PDF (Print)? This is a very annoying default if you frequently create .pdfs from books.
Okay, here is a possible solution-- open one file, and export it to .pdf using the File > Export menu and choose Print PDF. Now try exporting the book again. For some reason, the preference seems to stick when you do it this way, but not from the other.