Ruined Days by Guinotte Wise

Travis Meachem, a disillusioned middle-aged man, flies to Daytona to visit his dying father, Reno Pete. On his deathbed, Reno confesses his darkest secrets then commits suicide, leaving his son absolute proof of his part in the JFK assassination, along with instructions on how Travis can profit from it. Following his father’s cryptic advice, Travis heads to his uncle’s house in the Marais Des Cygne Wildlife Refuge, where they hatch a plot to ruin the days of those who destroyed their family. It’s an endeavor that will shake up the power corridors from New Orleans to Washington DC, and beyond. Along the way, Travis attracts some unlikely allies, among them a stunning creole girl, a streetwise rasta character, and a Dallas, Texas, police detective. But some allies are not what they appear to be, and Travis’s enemies aren’t the only ones in danger of having their days ruined for good. Is revenge hollow? It depends on who’s seeking it.

And why.