Kal Spriggs has a number of works available as e-book, audiobook, and paperback:

 

The Shadow Space Chronicles

 

Project Archon (Shadow Space Universe)

The Renegades (Shadow Space Universe)

 

 

The Argonauts (4HU)

The Eoriel Saga

 

 

Children of Valor (Star Portal Universe)

 

Forsaken Valor (Star Portal Universe)

 

Rising Wolf Series (Star Portal Universe)

 

       

Angel of Death

 

        

Army Space Corps

Dead Train