Ellie Marney is the New York Times bestselling author of NONE SHALL SLEEP, the Kirkus-starred sequel SOME SHALL BREAK, and the newly-released series finale ALL SHALL MOURN (Feb 2025). Her nine other award-winning YA thriller titles include THE KILLING CODE, EVERY BREATH, and WHITE NIGHT and her adult thriller debut arrives through Thomas & Mercer in 2026. Her books have been published in twelve countries and optioned for television. Ellie has spent a lifetime researching in mortuaries, interviewing law enforcement officers and autopsy specialists, and asking former spies how to make explosives out of household items. Now she lives quite sedately in south-eastern Australia with her family as she writes her next book.