The Pathfinder RPG Bestiary 2 includes:
More than 300 different monsters including new golems, giants, dragons, planar denizens, and classic creatures from mythology and gaming tradition.
An innovative format that gives each creature its own page or two-page spread for complete ecological detail and ease of reference Dozens of monstrous variants to modify creatures and keep players on their toes.
Numerous lists of monsters to aid in navigation, including lists by Challenge Rating, monster type, and habitat.
Universal monster rules to simplify special attacks, defenses, and qualities like breath weapons, damage reduction, and regeneration.
Suggestions for monstrous cohorts.
Plenty of new animal companions and familiars.