sentences:  In later years he produced cover illustrations and interior artwork for many children's books by John Bellairs, as well as books begun by Bellairs and continued by Brad Strickland after Bellairs' death.His first independent work, "The Unstrung Harp", was published in 1953.He also published under various pen names, some of which were anagrams of his first and last names, such as Ogdred Weary, Dogear Wryde, Ms. Regera Dowdy, and dozens more.