5 out of 5 rating for Monsternomicon
I found this monster book to be excellent - while there are only 40 individual monsters listed, many of them have several options to differentiate them. Dragonspawn, for example, have 27 optional gifts listed so you might have a poisonous beast with a long neck and the next version could be nimble with improved awareness. All the monsters have excellent artwork and a useful description to help a game master make his players treat them with caution. All the monsters here are creepy and deadly-looking. Handle with care.