From publisher blurb:
Terror from Beyond the Stars!
Mythos Monsters brings over 80 eldritch abominations from the dark places beyond the stars to your Pathfinder Roleplaying Game campaign, with beautiful artwork for every one! Unleash the mind-bending majesty of the Lovecraft mythos on an unsuspecting world, with mythos minions like the faceless stalkers, star vampires, and the hideous hybrid blood of Yog-Sothoth, horrific variants like embryonic aboleths and proto-shoggoths, gug savants and psionic neothelids, and inhuman horrors like shantaks, gugs, nightgaunts, and the hounds of Tindalos, or terrifying titans like bholes, mu spores, mythic shoggoths, and flying polyps. Their unfathomable plots are guided by monstrous masters like the mi-go, elder things, and denizens of Leng, or even some of the Great Old Ones themselves like dread Cthulhu and Hastur the Unspeakable. You’ll also find a ton of terrific templates to turn ordinary monsters into pseudonatural xenoid abominations or creatures blighted or corrupted with the chaos of the far realms, alongside expanded rules for playable deep one characters and slugspawn-infested moits of Shub-Niggurath, with full sets of sample stat blocks and additional spells and feats!