The Public Domain Encyclopedia (or PDE) is a book series dedicated to the lost treasures of the Golden Age of comics that are freely available to all. No cost, no charge. The 3rd volume of the PDE is dedicated to Centaur, one of the earliest and of the most controversial American comic book publishers (1936-1942). Centaur contributed to the success of the Golden Age of comics by creating several characters that, later on, became winning archetypes of the comicdom such as Amazing-Man (by Bill Everett), Dr. Occult (by Jerry Siegel and Joe Shuster) and the Clock, the missing link between the pulp and comic book heroes. The book includes 3 sections: an introduction collecting a timeline of Centaur Publications and Comic Corporation of America, the 2 sister publishing companies that formed the so called “Centaur Group”. A chapter dedicated to the hows and whys of Centaur bankruptcy and an article dedicated to the controversial relationship between Funnies Inc. (the studio that contributed to the creation of the Marvel Universe in the early Forties) and Centaur, in terms of creative support.