The Duals by Karen Hayes

Urban fantasy thriller

A young man and woman regain consciousness almost simultaneously in two different neighborhoods of NYC. They can't remember their own names; they don't recall anything that happened to them. They've no idea why they're being hunted down by "gorillas", as the girl nicknamed their mysterious enemies. But both can sense the primal, inhuman force that courses through their veins. The force that unites the two into a single higher being, making them Duals: the prehistoric forerunners of humanity. The powerful entities who are about to transform our planet.