From publisher blurb:
Eldritch Akasha: Dreams of the Void is Studio M—'s latest take on some mysterious and obscure akasha, expanding further on the Akashic Magic subsystem for PF1e with brand new options themed around the powers of space, dreams, nightmares, and the entropy of the universe!
Contained within this books are new:
Promethean Obessions: Five new obsessions for the promethean!
Forbidden Knowledge: Two new pieces of forbidden knowledge!
Archetypes: Two new archetypes for the kheshig and two new archetypes for the promethean!
Class Features: Two new confluences and planar attunements for the nexus!
Veils: Three new veils themed around dreams!
Storm Veils: Five new storm veils themed around the powers of space!
Feats and Traits: Thirteen new feats and one new trait!