Jess is the author of the historical fantasy trilogy The Cahill Witch Chronicles and the contemporary novels Wild Swans and The Last Summer of the Garrett Girls. She is the editor of the anthologies A Tyranny of Petticoats and The Radical Element, and co-editor (with Tess Sharpe) of Toil & Trouble: 15 Tales of Women & Witchcraft. Jess lives in Washington, DC, with her husband, mystery author Stephen Spotswood, and she works for the DC Public Library as a children’s library associate. Her next book, The Harrow Home for Wayward Girls, will be out in August 2026 from Holt.