My books are currently available at Amazon as eBook and trade paperback and pretty much everywhere as paperbacks. Below are links to my author pages.
B & N
In addition, here are some authors and books I recommend:
Leo Champion’s Legion and Shark Boats
David Weber’s Honor Harrington series
John Ringo’s Princess of Wands, A Hymn Before Battle, Into the Looking Glass, Ghost, and all the series they start.
Ryk Spoor’s Digital Knight, Boundary, and Phoenix Rising
Wen Spencer’s Tinker Series
Larry Correia’s Hard Magic and Monster Hunter International