Abdul Alhazred was the author of Al Azif, later known as the Necronomicon. (PROSE: The Banquo Legacy)
In the Clockworks, a chemist was selling the complete set of Paul Magrs' works bound in human skin. Panda thought that the Necronomicon might've been included, but the "Katy Manning" Iris corrected him, telling him that Abdul Al-Hazrad wrote it. (PROSE: Parsley Sage, Rosemary and Wildthyme)