Search - The Moon Pool

from the back cover:

Time is running out for Jolene. She's trapped by a madman, held captive, naked, waiting only for her worst nightmares to become reality. Her captor will keep her alive for twenty eight days, hidden in an underwater city 400 feet below the surface. The she will die horribly, like the others....

Jolene's only hope is Richard Dahlgren, a private underwater crime scene investigator. He has until the next full moon before Jolene becomes just another hideous trophy in the killers surreal underwater lair. But Dahlgren has never handled a case where the victim is still alive. And the killer has never allowed a victim to escape....