The whole story has very autistic vibes and the MC and many other characters give a lot of autistic vibes. It's basically "books and libraries are amazing and important and this is why!" Goes into stuff like book binding and practical stuff regarding books, and includes a lot of themes about history, knowledge, censorship, perspectives etc. There is also a character who seems to be purposely ADHD coded and I found her stuff quite relatable
Most of the main cast gives autistic vibes, with a dash of ADHD. The magic system itself is very in depth and the reader can even learn it themselves. There is also really good representation of various disabilities throughout even if no one is confirmed autistic or ADHD
MC is very AuDHD coded
I mean it's pretty much stated that most of the givers aren't very normal in the heads. But for real, autistics tend to get strongly attached to specific objects, and Rudo and many other characters read as autistic to me
Tanjirou is autistic and I will die on that hill. So is Nezuko (becoming a demon made the masking to bye-bye) and a bunch of other characters
If Maomao isn't autistic then no one is
Toshokan No Daimajutsushi