Shadow Shepherd (Sam Callahan Book 2)

The Tracker is a heart-stopping thriller that will keep you on the edge of your seat from start to finish.

When Sam Callahan's first legal client is gunned down in a Mexico City hotel, he finds himself in the crosshairs of every dangerous player in the city.

With only 24 hours to save his girlfriend from a ruthless kidnapper, Sam must use all of his skills and resources to outsmart the killers and bring her home alive.

But as the clock ticks down, Sam realizes that he may not be able to keep her safe after all.

Will he be able to overcome the odds and save the woman he loves, or will he become the next victim? Find out in this gripping and action-packed thriller from Chad Zunker.