Nick Carter
Pseudonym of Jerry Ahern
House name used by multiple authors for the <a href="https://www.isfdb.org/cgi-bin/pe.cgi?55690">Killmaster</a> series. More known authors are Michael Avallone, Willis T. Ballard, Jim Bowser, Nicholas Browne, Bruce Cassidy, Thomas Chastain, Robert Colby, DeWitt S. Copp, Chet Cunningham, James Fritxhand, Ralph Hayes, Al Hine, Richard Hubbard, Arnold Marmor, Douglas Marland, Valerie Moolman, Homer H. Morris, Craig Nova, Forrest V. Perrin, Larry Powell, George Snyder, Linda Stewart, Lawrence Van Gelder, Jeffrey M. Wallmann, Saul Wernick, Lionel White and others.