Over the years, Matthew Langdon (aka Matt) Cost has owned a video store, a mystery bookstore, and a gym. He has also taught history and coached just about every sport imaginable. Cost published Joshua Chamberlain and the Civil War: At Every Hazard in 2015, in which Emmett Collins grows into manhood during the Civil War. Emmett returns in Love in a Time of Hate: New Orleans During Reconstruction (Encircle Publications, August 2021). I am Cuba: Fidel Castro and the Cuban Revolution was published by Encircle Publications in 2020. Encircle has also published Cost's Mainely Mystery series including Mainely Power, Mainely Fear, and Mainely Money, as well as the Clay Wolfe / Port Essex Mysteries, beginning with Wolfe Trap. Mind Trap will be published in December of 2021, and Mouse Trap in the spring of 2022. Cost now lives in Brunswick, Maine, with his wife, Harper, and now spends his days at the computer, writing.