From publisher blurb:
Cthulhu Sleeps, Gillmen Awake
Beneath the sea, the gillmen serve their insane deity in their bid for freedom from their cruel aboleth creators. Against all kinds of undersea horrors they demonstrate their bravery. Now they fight to tame the wild underwater realms and make a home for themselves.
Book of Heroic Races: Advanced Gillmen is the essential guide for playing a gillman character. This 22-page supplement features:
Racial Traits to play a gillman, 5 Alternate Racial Traits, and 3 Character Traits to customize your character for this unique play experience
17 New Character Class Options, including the dangerous lightningcaster magus archetype, the grotesque tentacled horror bloodrager archetype, the catshark familiar, the order of the sinking ship cavalier order, the depths shaman spirit, a new time thief temporal talent, a new hunter animal focus, a new soulknife blade skill, and much more
5 New Feats, including the new squid martial arts style
7 New Magic and Mundane Items and 8 New Spells and Psionic Powers
2 New Deities, reflecting a dichotomy of views on achieving freedom from one’s enemies
Details on gillmen adventurers as well as suggestions on how to incorporate this race into your world.