The Hollow Girl, by Reed Farrel Coleman

Drunk, alone, and racked with guilt over the tragic death of his girlfriend Pam, Moe Prager is destined for oblivion. But destiny takes a detour when a shadowy figure from Moe’s past reappears to beg for Moe’s help in locating her missing daughter. As a reluctant, distracted Moe delves into the case, he discovers that nothing is as it seems and no one involved is quite who or what they appear to be.

The Hollow Girl