William Bradley Strickland (born 1947) is an American writer known primarily for fantasy and science fiction. His speculative fiction is published under the name Brad Strickland except for one novel written as Will Bradley. By a wide margin his work most widely held in WorldCat participating libraries is The Sign of the Sinister Sorcerer (Dial Books, 2008), which concluded the Lewis Barnavelt series created by John Bellairs (1938–1991).