What is it called when an author writes under a false/alais name?

pseudonym or pen nameWhat is it called when an author writes under a false/alais name?
Pen name or pseudonymWhat is it called when an author writes under a false/alais name?
It is called either a ';pen name'; or pseudonym.





http://en.wikipedia.org/wiki/Pseudonym (Interesting!)
a pen name


mine is shaunna sawyer
pen name
A pen name/nom de plume/literary double, is a pseudonym authors use in place of their real names.
ghost writer
pseadonym
Non de plume
Alias
it's called a nom de plume
pen name or pseudonym