One of the first maps I made was a library in both functioning and destroyed state. I wanted to revisit this idea so I made this new three story library. The idea is that this is a somewhat magical library and up on the third floor there is a hidden room that houses a very powerful book. Perhaps your adventurers need to find it, steal it, or protect it. In the alternate version, I also have the trashed version of the library. I did two versions of the third floor, one with the book still there, and one with it stolen.