Cash and Colcord (Book 2)

When a reclusive man is found dead under grisly circumstances in the Colorado wilderness, CBI Agent Frankie Cash and Eagle County Sheriff Jim Colcord, whom we met in the New York Times bestseller Extinction, team up again on their most enigmatic and dangerous case yet. Their investigation uncovers a trail of bizarre killings, baffling money transfers, and a fanatical secret society. And all the while, the resurrected Neanderthals, who vanished into the Colorado mountains, seem to be biding their time for something ... spectacular.