The emphasis on Paizo’s fourth monster book and it has numerous worthwhile creatures in here, most of them being evil. As always, a few are collected from their Adventure Path series, the Nosferatu vampires which live in Ustalav (Pathfinder‘s version of Ravenloft). The emphasis in this tome are Lovecraft’s creations (they are in the public domain) and monsters which come with mythic levels attached. These tend to be legendary types too, a giant with 100 eyes like Argus from Greek mythology, colossuses made of corpses or stone, and creatures bordering deity-like powers. They’re not much use without the Mythic Adventures rulebook to add their abilities. I’m more glad Paizo provided more examples.
Other categories they’ve boosted that I love, additional “races” of giants and two more types of hags. The latter are a key to the primary campaign I’m running.
Not in the mood to spend the $45 for the hardback book, it comes in softcover too.