Collecting issues #1 through #10. The deadly tides of change rise above the surface in the exciting third chapter of the best-selling action-adventure series, FATHOM! Humankind faces a new threat to their existence from the ancient and powerful underwater race - the Black - while the return of the villainous Killian sends shockwaves throughout the already-devastated world of the Blue. Meanwhile, Aspen Matthews attempts to adjust to life above the water, but soon discovers that a future - and past - threat emerges to destroy her newly found safe haven!