Well - it's inspired by the SCP Foundation wiki. The guy who wrote it was a prolific poster to that. Some of what's in the book was actually posted by him in serialized format there; in fact, there's even a video series covering some of the stories:

https://www.youtube.com/watch?v=w-IiVeGAydE

If the videos seem like your cup of tea, you should give the book a read.