Now in audio books, the first three Executioner Novels by Don Pendleton.

Narrated by Shawn Compton, published by Tantor, Available at Audiobooks; Audible, and other retailers. 
Book 4 coming September 29th and Book 5 October 20th. 

Book 4 coming September 29th and Book 5 in mid-October.   

 
Coming September 29th  Miami Massacre

 

Coming October 20th  Continental Contract