Best Enemies By Michael Kimball

Two cowboys find themselves marooned on a tiny desert island, lone survivors of a sabotaged rodeo cruise ship. Rex is a grim loner haunted by his past. Cody is a rodeo clown with a lust for conversation and a relentless curiosity.
 
To preserve their sanity, they’ve invented imaginary geography and instituted a system of laws, but ultimately their carefully constructed universe begins to unravel as personalities clash and each man begins examining his life as death seems more and more inevitable.
 
The unlikely circumstances lift familiar human foibles into high relief as these men wrestle with and ultimately release their demons with the help of three night visitors…