Forgotten Foes by Tricky Owlbear
This product is 197 pages long. It starts with a cover, back cover, ToC, intro and credits. (6 pages)
Next it jumps right into the monsters. (161 pages)
Achaierai
Aerial Servant
Aranea
Arrowhawk
Athach
Azer
Basilisk, Abyssal
Basilisk, Greater
Battle...