Enchanted books
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.
Thank you for your report.
However, your ticket has been resolved as a duplicate.
This issue has been linked to the original bugreport: MC-83897. You can find or add further information on that report.
Please search before reporting any bugs, as it's likely that one exists already.