Hijack the Seas: Tsunami (Cassandra Palmer, #14)

Cassie Palmer, once the chief seer of the supernatural world, is out of a job. She’s also out of time—her time. Thrown fifty years into the future by a spell she doesn’t understand, she finds herself sans power, sans allies, and sans a plan—except to get to her heir, Rhea. She received the Pythian power after Cassie vanished but is being held captive by the ancient gods, who found a way back to Earth and turned it into a wasteland.

With the help of John Pritkin, a powerful mage, Mircea Basarab, the sole survivor of the once-dreaded vampire senate, and a rag-tag group of survivors, Cassie must make the impossible happen. And find a way back to her own time to ensure that this one never takes place. But a whole pantheon stands in her way, and they will stop at nothing to wipe out the last remnant of her mother’s blood and the last chance that Earth has for survival.