È l'autore di cinque romanzi aventi come protagonista il vampiro Don Sebastian de Villanueva[3], un nobile spagnolo cinico e misantropo.
È anche critico di fumetti avendo scritto numerosi saggi sul tema, come Comix: A History of the Comic Book in America (1971) e Living in Fear: A History of Horror in the Mass Media (1975)[4].
Opere
Romanzi
Don Sebastian de Villanueva
The Black Castle (1978)
The Silver Skull (1979)
Citizen Vampire (1981)
Yellow Fog (1986)
No Blood Spilled (1991)
Saggi
Comix: A History of the Comic Book in America (1971)
Living in Fear: A History of Horror in the Mass Media (1975)
Marvel: Five Fabulous Decades of the World's Greatest Comics (1991)
DC Comics: Sixty Years of the World's Favorite Comic Book Heroes (1995)
Superman, the Complete History: The Life and Times of the Man of Steel (1998)
Superman: Masterpiece Edition (1999)
The Complete History: The Life and Times of the Dark Knight Batman (1999)