Taryn’s Tiderider by JL Madore

Can love save two races headed for extinction?

Alien abduction? Seriously? After the ice caps melt and humanity devolves to its base survival instincts, Mackenzie can’t imagine life getting any more dangerous. Until she wakes in an underground city of protective alien warriors.
Taryn should never have brought the human back to Atlantis. Now, instead of dealing with the attack of sea creatures, failing shields, and their kind nearing the brink of extinction, he’s fighting the constant arousal of being near Mackenzie, the human woman haunting his fantasies.