Sarah Crossan grew up in Ireland and England. She graduated with a degree in philosophy and literature before training as an English and drama teacher at Cambridge University. She also completed her Masters in creative writing at the University of Warwick. In 2010, she received an Edward Albee Fellowship for writing. She taught English for many years before deciding to writing fulltime. Her teen novels include Breathe, The Weight of Water, Resist: Breathe 2, Apple and Rain, and One. She was awarded The Bookseller's 2016 YA Book Prize as well as the CILIP Carnegie Medal for her novel, One.