Sweet Shadows (Medusa Girls #2)

Triplets narrate, teen descendants of Medusa. Warring factions among the gods of Olympus are coming; creatures of the Abyss are pushing into San Francisco; boys in their lives hide dangerous secrets.

Tough Gretchen has fought monsters the longest, trains newfound sisters. Perfectionist Greer keeps her social calendar, faints from visions. Compromising Grace worries about missing brother Thane.