In the 1940s, several writers established themselves as a stable of reliable contributors to "Amazing". These included David Wright O'Brien and William P. McGivern, both of whom wrote an immense amount for Ziff-Davis, much of it under house names such as Alexander Blade. John Russell Fearn became a prolific contributor, using the pseudonyms "Thornton Ayre" and "Polton Cross". Palmer also encouraged long-time science fiction writers to return, publishing pulp authors such as Ed Earl Repp and Eando Binder. This policy did not always meet with approval from "Amazing"'s readers, who, despite a clear preference for action and adventure stories, could not stomach the work of some of the early pulp writers such as Harry Bates.