On the one hand, there are a good couple of gems and some very inspired entries throughout this book and, in truth, two stars is somewhat unfair, especially for the PDF. But, personally, I feel they're warranted, as this book seems to signal a shift in Pathfinder's direction, and one that I'm not happy about in the least.

First off, while Occult Adventures is readily available for consultation online in the SRD, I did not like to see a sizable number of monsters using rules from that book. It's one thing to have spells or feats from, say, Advanced Player's Guide or Mythic Adventures, as those are books that complement the game as a whole and present options for all classes, whereas Occult Adventures is a very specific niche that not all players will want to incorporate in their campaigns.

Secondly, I did not like the muddled product identity Paizo is showcasing here, with monsters such as the Android, Gray (Roswell), Reptoid (Reptilian) and Robot. Even the Annunaki seems more at home as the antagonist of, say, a Legion of Super-Heroes comic book. It's one thing to want to provide the tools for varied and diverse fantasy campaigns - in which constructs, space aberrations and even clockwork creatures can easily work without sticking out like sore thumbs - but quite another one to insert borderline hard-SF or contemporary conspiracy theorist creatures on a lark. Expedition to the Barrier Peaks this is not, and let's endeavor to keep it that way, please.

Thirdly, snake-bodied weasels with boar tusks? Serpentine bulls? Shark-headed sea serpents? Wolf-headed sea serpents? A chinchilla with a bat wing on the tip of its tail? An octopus with three shark heads? Really? Unless you have an absolutely amazing hook or a compelling campaign seed, why bother putting out this silly, uninspired dross? You can do much better than this, Paizo.