Abigail Dean is an English writer, living in south London. She is the author of the novels Girl A (2021), Day One (2024), and The Death of Us (2025).
Dean was born in Manchester, England, and grew up in Hayfield, Derbyshire. She graduated from Robinson College, Cambridge, in 2008, with a degree in English literature. After her degree, she took a law conversion course, eventually specialising in information technology law, in which she has had a career. She worked as a lawyer for Google.
In 2019, it was reported that Dean received a six-figure sum from UK publisher HarperCollins for her first novel Girl A, and another, The Conspiracies. She reportedly received a seven-figure deal from US publisher Viking Press. Girl A was published in the UK in January 2021.
She works as a full-time writer. She lives in South-East London with her husband, son and cat called Woody.