Echo Dominion (Echo Power Trilogy Book 2)

The apocalypse has reawakened—and it wants blood. To save Earth, a Zen ex-cop partners with a reckless former Marine on a dangerous mission into a parallel world created by magic. Can Grant and Erin change the rules? Or will they become the next casualties? Take a pulse-pounding trip into the heart of the Echo in this dark and steamy PNR.