JW North and his "big dog" Ares are back. This time North is a U.S. Marshall and member of the Serial Criminal Task Force. North, Ares, and partner, Ben Kellum, trail the Truck Stop Killer who has created a swath of murdered prostitutes across the United States. The trail leads to a bolted gate in front of an old trailer 20 miles north of Prescott, Arizona. They cut the lock; the gate swings open with a loud groan, warning the killer inside. Will they be on time to save the serial killer's latest victim and stop him from more depredations? Award-winning author S.L. Ditmars follows up on his canine-inspired BIG DOGS: Book One In The 'Big Dogs Series,' with this action-packed thriller GASPING FOR AIR: Book Two In "The 'Big Dog Series.'