Andrea Mara is a Number One Sunday Times, Irish Times, and Kindle bestselling author, who has been shortlisted at the An Post Book Awards for six of her books, and won Irish Crime Novel of the Year for It Should Have Been You in 2025. Her books have sold over 1,000,000 copies across all formats.

Her 2021 novel, All Her Fault, has been adapted for TV, starring Sarah Snook in her first role since Succession. It aired to huge viewer and critical acclaim on Peacock/ Sky in November 2025.

Her most recent novel, It Should Have Been You, was a number 1 bestseller in Ireland for six weeks, and a Top Ten bestseller in the UK hardback charts.

Someone In The Attic, published in June 2024, went straight to number 2 on the Irish bestseller list. It was published in the US in August 2024, her US debut. The New York Times said: “[Mara] lays out the pieces of the puzzle with diabolical wit, some good suspense and an unexpected note of sentimentality.” 

Her previous novel, No One Saw A Thing, was a Number One bestseller in the UK, in Ireland and on Kindle, a Richard and Judy Book Club pick, and has sold over half a million copies. In Ireland, No One Saw A Thing spent five months in the Original Fiction Top Ten followed by seven months in the Paperback Top Ten.

All Her Fault was Sunday Times Crime Book of the Month, a top ten bestseller in the UK and Ireland, and a Kindle Top 5 bestseller.

She lives in Dublin, Ireland, with her husband and three children.