Even if it were not written with the Kingmaker AP in mind (pretty obvious, seeing as I'm GMing it right now!), this is a glorious and beautiful collection of ten well-concieved and thoroughly developed critters suitable for throwing at any adventurer bold enough to venture into a temperate forest.
Each critter comes with a full-colour illustration and a description suitable for reading out to your players when they first catch sight of it. Full stats are given with hyperlinks to the PFSRD should you need reminding of precisely what each obscure ability lets it do, as well as explanations of special abilities laid out clearly. Ecology, combat tactics and more are covered in the copious notes provided here for you to read through, as well as what local lore and other sources may say about the creature in question.
GMs who prefer printed notes will be pleased to find that each monster fills two or three pages, so there are no awkward split pages to contend with. The full-colour illustration is provided on a page by itself, so you can hold them up with a 'this is what you see' - it's nice to be able to avoid giving the creature name (which isn't on that page) on first introduction, or even when it appears again.
As if all this wasn't enough, there are 2-sided 'flat' paper miniatures for each monster provided at the end.
Good innovative monsters, well presented with thoughtful backgrounds - it doesn't matter if you are running Kingmaker or not, if your adventures ever wander through forests this is worth a look.
[5 of 5 Stars!]