In 15w37a I was looking for a desert and I found a Desert Temple. When I checked the loot I saw an 'enchanted book'. This has been an issue before, but in the 'official' release that was fixed.
I have not checked for dungeons or minecarts etc. but these books are supposed to have enchantments on them.
I also don't know if others have the same problem, because I haven't seen it reported before.