An American fantasy writer of LGBT-themed work, she is most famous for her acclaimed Nightrunner series and for her Tamir Triad.
Before beginning her career as a novelist, she worked as a teacher and a necropsy technician.
The two main characters in Flewelling's Nightrunner books are bisexual.
She married Douglas Flewelling in 1981; together, they had two sons.
Orson Scott Card praised Flewelling's literary work.