Pseudonym the attempt was not entirely successful – and the two are still sometimes confused by booksellers. A pen name may be used specifically to hide the identity of the author, as in the case of exposé books about espionage or crime, or explicit erotic fiction. Some prolific authors adopt a pseudonym to disguise the extent of their published output, e.g. Stephen King writing as Richard Bachman. Co-authors may choose to publish under a collective pseudonym, e.g., P. J. Tracy and Perri O'Shaughnessy. Frederic Dannay and Manfred Lee used the name Ellery Queen as both a pen name for their collaborative
Pen name Carroll) may use a pseudonym for fiction writing. Science fiction author Harry Turtledove has used the name H. N. Turtletaub for a number of historical novels he has written because he and his publisher felt that the presumed lower sales of those novels might hurt book store orders for the novels he writes under his own name. Occasionally, a pen name is employed to avoid overexposure. Prolific authors for pulp magazines often had two and sometimes three short stories appearing in one issue of a magazine; the editor would create several fictitious author names to hide this from readers. Robert