From Spectralicy:

Libraries are places of knowledge and when a group of heroes are in need of knowledge that’s been lost to the ages, they must go to a library that’s been lost just the same. In my world, this lost library, which houses great knowledge and terrible dangers, sits under a royal magic academy, but it only opens its secret entries to a select few and even if you’re lucky enough to get in, there’s no guarantee the library will allow you to leave.

When I made these in Dungeondraft, I made sure to put in all the things you need in a library: Books, shelves for the books, dust and cobwebs, a maze, plenty of potential secrets, a grotesque monster trapped in a pit, and most importantly places to have a seat while you study! I used quite a few recolored and modified assets that I did using Clip Studio, as well as adding in some dark shadows and candlelight to set the mood.