This is a bit embarassing - it appears that this product has been produced as a result of a review I wrote!
Herein are descriptions and other information - mostly 'fluff' rather than 'crunch' - for the magical beasties suggested as potential companion animals in the two works produced by Caged Dragon Games. This is particularly useful for those creatures which do not feature in core Pathfinder RPG books such as the Bestiary - it's all very well for people who have been playing for years and have stacks of books, but even then you do not really want to have to go looking through them all to find out what your new companion actually looks like!
The opportunity has also been taken to add further mechanical suggestions for many of the creatures: possible feats, notes on special attacks or properties, etc. that had not been mentioned earlier.
A particular well done to Caged Dragon Games for adding these, particularly as a free addition.