From publisher blurb:
Monsters Unleashed V.1 is the first release in an exciting line of short monster supplements designed to update a host of 3.X monsters to the Pathfinder Roleplaying Game ruleset. The monsters for this series have been selected by the patrons of the Monster Update Project that was launched by Purple Duck Games as our premier product of August 2010.
The first Monsters Unleashed features updated statistics for the barrow wight, crystalline horror, devil dog, dragonnel, kech. All have been updated to the Pathfinder Roleplaying Game ruleset by Stefen Styrsky and Mark Gedak and illustrated by Michael Scotta. Multiple counters for each creature are also included.