Cost has published a historical on Joshua Chamberlain and the Civil War. In March of 2020 his latest historical comes out on Fidel Castro and the Cuban Revolution. In September comes the remastered version of the first in a triolgoy of mysteries set in Maine. Over the years, Cost has owned a video store, a mystery bookstore, a gym, as well as taught history and coached just about every sport imaginable. He now lives in Brunswick, Maine, with his wife, Harper. There are four grown children; Brittany, Pearson, Miranda, and Ryan. A Chocolate Lab and a Bassett Hound round out the mix. He now spends his days at the computer writing.
- Joshua Chamberlain and the Civil War: At Every Hazard
- I Am Cuba; Fidel Castro and the Cuban Revolution