From publisher blurb: “Into the Breach” is a series of “crunch-focused” books intended to expand the options available to the “Base Classes” (the alchemist, cavalier, gunslinger, inquisitor, magus, oracle, summoner, and witch). This book expands on Pathfinder’s answer to the gish: The Magus. Within this guide you’ll find 11 new archetypes, 7 new arcanas, 7 new feats, 8 new spells, and 1 new magus friendly prestige class.