E.J. Copperman is the nom de plume for Jeff Cohen, writer of intentionally funny murder mysteries. As E.J., he has written the Haunted Guesthouse and Agent to the Paws series, as well as the Jersey Girl Legal Mysteries, the Fran & Ken Stein Mysteries, and the brand-new Haunted Paint Store Mysteries; as Jeff, he has written the Double Feature and Aaron Tucker series; and he collaborated with himself on the Samuel Hoenig Asperger's Mysteries.

A New Jersey native, E.J. worked as a newspaper reporter, teacher, magazine editor, and screenwriter before his first book was published to critical acclaim in 2002. In his spare time, Jeff is an extremely amateur guitar player, a fan of Major League Baseball, a couch potato, and a crossword addict.