X-Factor, Vol. 21: The End of X-Factor

Peter Allen David (September 23, 1956 – May 24, 2025), often abbreviated PAD, was an American writer of comic books, novels, television, films and video games. His notable comic book work includes an award-winning 12-year run on The Incredible Hulk, as well as runs on Aquaman, Young Justice, Supergirl, Fallen Angel, Spider-Man, Spider-Man 2099, and X-Factor. His Star Trek work includes comic books, novels such as Imzadi, and creation of the New Frontier series. His other novels include film ada...

Leonard Kirk is a comic book artist with a long history of work for major publishers like Marvel and DC. He is best known for illustrating Sabretooth and Sabretooth and the Exiles. His work focuses on the gritty, action-heavy side of the X-Men universe.