Thirteen-year-old Mia Kingtide can do what no one else can: breathe beneath the waves, understand sea life, and feel the ocean’s pulse as if it were her own.

Off the coast of Pacific Grove, a strange machine crawls across the seafloor, harvesting rock samples. No research vessels. No permits. Just whispers of “clean innovation” and limitless profit. When old names reappear and familiar ships return, Mia realizes this is more than exploration-it’s exploitation.

With her dad Luke, her sea-lion friend Luna, and new allies above and below the surface, Mia races to uncover the truth before Monterey Bay’s sanctuary is lost to greed.

Blending real marine science with heart-pounding adventure, The Vanishing Sanctuary dives into a world where the ocean fights back-and one girl must decide how far she’ll go to defend it.