Each paperback copy is $14.99 + $1.27 = $16.26
Free shipping in the U.S.

 The Oath

 Kissed By The Snow

 The Custer Conspiracy

Although I can’t personally sign an eBook, they are available on Kindle or Smashwords.
You can also download the Audiobook of The Oath on Audible, Apple Books and other retail sites.