Deborah Harkness is the #1 New York Times bestselling author of the All Souls series, which includes A Discovery of Witches, Shadow of Night, The Book of Life, Time's Convert, and The Black Bird Oracle. A history professor at the University of Southern California, Harkness has received Fulbright, Guggenheim, and National Humanities Center fellowships. She lives in Los Angeles.

Deborah Harkness made her fiction debut with book one of the All Souls trilogy, A Discovery of Witches, which was a New York Times bestseller and has been translated into more than thirty languages. A professor of history at the University of Southern California, Harkness has received Fulbright, Guggenheim, and National Humanities Center fellowships, and her most recent scholarly work is The Jewel House: Elizabethan London and the Scientific Revolution.