There are 2 books in the Lone Star Leathernecks series.
The Lone Star Leathernecks series does not have a new book coming out soon. The latest book, As You Were, Cowboy (Book 2), was published in December 2017.
The first book in the Lone Star Leathernecks series, Semper Fi Cowboy, was published in June 2017.
The Lone Star Leathernecks series primarily falls into the Contemporary Romance genre.