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 to him by a disciple and started using it as his pen name at the age of 36. Similar to a pen name, Japanese artists usually have a "gō" or art name, which might change a number of times during their career. In some cases, artists adopted different "gō" at different stages of their career, usually to mark significant changes in their life. One of the most extreme examples of this is Hokusai, who in the period 1798 to 1806 alone used no fewer than six. Manga artist Ogure Ito uses the pen name Oh! great because his real name