Ralph Compton Calvert's Last Bluff

In this brand-new Ralph Compton Western, a hard-bitten gambler and a hard-luck kid begin a treacherous journey to new lives. In Omaha, Tom Calvert boards a riverboat to play high-stakes poker, but accusations of cheating cause some serious trouble, and a deadly gun battle ensues.  Tom is injured and knows that his enemies will be looking for him, so he reluctantly accepts a bargain from young stowaway Asher.
In exchange for Calvert teaching him gunslinging skills, Asher will guide them to a possibly mythical town of peace and plenty called Friendly Field. To get there they just have to battle assassins, dangerous Shoshone, and the rough wilderness of the Oregon Trail.