Bayou Trackdown by Jon Sharpe

The trailsman meets a murderous monster... In the marshy wilderness of Louisiana’s Atchafalaya Swamp, people are being killed by a monster that strikes without mercy, leaving behind little more than mangled flesh, blood, and bones. Now, Fargo finds himself hunting a creature straight out of a bad dream. And once he finds his quarry, the Trailsman is determined to put the nightmare to sleep once and for all…