Cassidy, Carla. Swamp slayings.

Harlequin intrigue #2194

"When dashing Jackson Fortier stumbles-literally-into the bayou's inner depths, he never expects to encounter a gorgeous woman in the swamp. Little does he know, Josephine Cadieux has an ulterior motive for getting to know him: infiltrating his world to find the man who brutally attacked her. But the more Josie tries to ignore her feelings for this stranger, the more determined he is to keep her safe...and out of the clutches of a serial killer"--