Megan Lindholm is also Robin Hobb
Michelle West is also Michelle Sagara or even Michelle Sagara West
Dawn Cook is also Kim Harrison
Nora Roberts is also J.D. Robb
Lyda Morehouse is also Tate Halloway
Lynn Viehl is also Gena Hale, S. L. Viehl, and Jessica Hall
Anne Rice also writes under Anne Rampling and A.N. Roquelaure
and I just found out Amanda Quick is also known as Jayne Ann Krentz
and that Stephen King is also Richard Bachman and John Swithen
More pseudonyms. and more.
Know any other good ones?
specficromantic 
Amanda Quick is also Stephanie James
Sherrilyn Kenyon is also Kinley MacGregor
I was totally surprised by Amanda Quick = Jayne Anne Krentz. And she's also Stephanie James? Prolific!
oh she is also Jayne Castle for her paranormal books. she has lots of names. indeed.
Elizabeth Lowell is Ann Maxwell.
i feel like there are others on the edge of my brain but i can't think of them… hmm.
Not sure I am familiar with that author.. Yeah, I think there are some more that I was all surprised over but it's not coming from my memory banks. Wouldn't it be INTERESTING if L.J. Smith had one?!