Leslie is the author of 15 novels including 9 best-selling April Woo thrillers. Her novel, Over His Dead Body, which was first produced by Robert Brustein as the play, Strokes, was optioned for a feature film. Her novels Getting Away with It, Modern Love, and the April Woo series were all optioned for feature films.
She has also worked as a writer in a variety of formats. In New York she worked in advertising, publishing, and at New York Magazine, where she started and wrote the Intelligencer column. She was a freelance magazine writer of both feature articles and fiction. Leslie is also a playwright and worked as a scriptwriter on The Guiding Light before turning to fiction full time.