People I know who hide their identities behind a pen name don't want the majority of the world to know what kind of fiction they're writing (typically erotica.) Those authors make confident that no one can link their work to their real names.
Other authors work in different genres under various aliases but do not attempt to conceal their true identities. The pseudonym makes it easier for the reader to figure out what kind of book it will be. cheap custom essay writing services.