not as useful as the advanced raced guide for the monsters you could play as it does have a lot. i own this and well do my best to keep it hidden from my players. they keep trying to make them fight dragons... they are lvl 5
I, as both a player and a GM, in different campaigns, find this to be really useful. i used to play third edition D&D and since i picked this up i have been trying to incorporate the two. as a player i still refer back to my ravenloft book for some ideas but other than that i avoid other products because this provides so much