Don Pendleton's first book of his internationally best selling The Executioner, Mack Bolan Series, originally published in paperback 47 years ago in 1969; and then re-issued 26 years again 1988; ebooks of the series for the first time in Dec. 2014; and now again, War Against the Mafia is in PRINT as of October 11, 2016. The next two books of the series, Death Squad, and Battle Mask, are in print now, also.
Don Pendleton is considered "the father of the Action/Adventure literary genre," a term he himself coined. Random House Historical Dictionary of American Slang, Volume II (H-O) gives derivation credit for "live large" to Don Pendleton and his Executioner Series.
The print books can be purchased at Amazon.com and Barnes and Noble.