1) Paul (William) Barnett b. 1935 is a retired Anglican Bishop of Australia.
2) Paul Barnett b. 1949 writes under at least three pen names: John Grant, Eve Devereaux and Armytage Ware. His works are about fantasy and science fiction, juggling, card games, tricks and flags.
3) The third Paul Barnett is the author of "Conservation and Natural Resources."