Jeff Cohen is the nom de plume of Jeffrey Cohen, author of the Aaron Tucker mystery and Double Feature mystery series and as E.J. Copperman, the Haunted Guesthouse mystery series. ...ver maisJeff Cohen is the nom de plume of Jeffrey Cohen, author of the Aaron Tucker mystery and Double Feature mystery series and as E.J. Copperman, the Haunted Guesthouse mystery series. His hobbies include speaking about himself in the third person.ver menos