Killer Abyss

For FBI handler Meg Jennings and her K-9 partner, Hawk, the search for a missing girl leads to the underground caves of Kentucky-ones darker than she ever fathomed.

No descent into the unknown has ever been too treacherous for Meg Jennings and her colleagues in the FBI K-9 unit. They are prepared for anything. But when 14-year old Larissa Whorlow disappears on her way home from school in Nashville, Tennessee, Meg may be proved wrong.

Their only hope is a tracker tag on Larissa's shoe, worn at...