No reason was given for the use of the pen name.

His 1961 book was published under a still different pen name.

Pen names did not come to life and murder people.

These were published under his own name and several pen names.

He has written with many pen names and wrote thousands of stories.

But what happens when you have to choose a pen name?

The character was so popular that later stories were published under this pen name.

James Rollins is another pen name used by the author.

He has been known for writing articles under different pen names.

Most political essays of the time were written under pen names.