"Materials used by the cartographer Jean-Paul Tremblay, who has contributed brilliantly to several of my books. I like his work very much indeed, and keep him in mind when I am laying out the map-work for my books. I know that if I can visualize it in my own mind, Tremblay can transfer that concept onto the printed page. We work closely, but Erskine or Krantz usually finds something that must be corrected, for cartographers are lousy spellers. Tremblay is no exception but his maps are the best in the business and form an essential part of my books."