Same planet, different worlds

[rivkat]

Today, using a pen name is less often a creative or playful endeavor than a commercial one. Reticence is not what it used to be. Well, I guess if you limit your inquiry to commercial endeavors, that might seem to be the case?  But pound for pound, it's hard to believe that commercial pseuds outnumber noncommercial ones.  Too bad, the book title sounded interesting.