It’s some pretty standard non-fiction. Each essay is only a few pages long, but none of them will really help you make that novel about your Dungeons and Dragons games more realistic. It’s more there to give you ideas on what to think about when writing certain aspects. Or to check yourself before you wreck yourself (i.e. bust some common myths). There are overviews on medieval life and things that people get wrong. And it gives you some suggestions for lesser-used options in fantasy, such as 900 A.D. Mesopotamia or Black Vikings. I guess I’m glad I read it, but don’t pick it up thinking “Oh, this is going to write my novel for me.”