Into the Drowning Deep (Rolling in the Deep, #1)

by Mira Grant

The creatures that wiped out the Atargatis were real. They were unknown to science, their presence indicated by folklore and mythology around the world, and now that the seas were changing and humanity was looking to them for the hope of salvation, the chances of those creatures being found again—found officially, on the record—were increasing by the day. Discovery was inevitable.

Mankind has a responsibility to the sea. We owe it our lives.