From publisher blurb:
Let loose the beasts of the phrenic scourge with this latest release in the Psionic Bestiary! With five new psionic monsters all based on the phrenic scourge, your players will learn just how dangerous the tentacled menace truly is.
Included in Psionic Bestiary: Phrenic Hegemony are the phrenic adept, phrenic dreadnaught, phrenic infiltrator, phrenic larva swarm, and phrenic matriarch, plus variants of the phrenic adept to give some alternate options to keep your players guessing!
In 2011, Dreamscarred Press held a contest for a psionic bestiary. The monsters from that contest are being released in a series of releases and will ultimately be compiled into a single psionic bestiary book.