Much more sketchy than i expected. Additionally the "map" was a sketch with no scale and the prose only roughly described the library. The main NPCs were also only described in broad strokes: no names, just appearance and their specialties. The hooks were nice though and the only thing i could use for my purposes in my campaign.
So if a broad sketch is what you are after, this is a great product. But for most games, when th party has to interact and deal with the library, i would not recommend this pdf.
[3 of 5 Stars!]