American comics and humor writer. He was a coauthor with Gerard Jones on The Beaver Papers, The Comic Book Heroes, and the comic book The Trouble with Girls. He was a contributor to National Lampoon magazine and various DC Comics. Jacobs left professional writing in the 1990s to start a used and antiquarian book service, Avalon Books. He co-wrote with Jones The Comic Book Heroes, a book dedicated to the history of the American comic book industry from the Silver Age to the present.