Quick

the long version

"A sadistic killer roams the shadow world of undocumented aliens and the first glimpse law enforcement has of him is when tough, determined female Border Patrol Agent Hunter Kincaid watches through binoculars as the killer shoots his own partner for being too slow, then crosses the Rio Grande into Mexico. Two thousand miles away, South Florida Homocide Detectives John Quick and Randall Ishtee investigate the machete murder of an undocumented female, and a slender thread of evidence stretches all the way to West Texas. Hunter joins forces with John and Randall to track down the monster. What they don't know is the killer is aware, and his focus, is now on them."--Back cover