Andrea Mara is a number one Sunday Times, Irish Times and Kindle bestselling author, whose books have sold more than one million copies across all formats. The TV adaptation of her 2021 book, All Her Fault, aired in November 2025 to huge critical and audience acclaim, with Sarah Snook (Succession) playing the lead. It became the most-watched TV show in America during the first week of its release. Her most recent novel, It Should Have Been You, won Irish Crime Novel of the Year at the 2025 An Post Book Awards. It was a No.1 bestseller in Ireland for six weeks, and a Top Ten Sunday Times bestseller in the UK. Her book No One Saw a Thing was a Sunday Times number one bestseller and has sold over half a million copies. Andrea lives in Dublin with her husband and three children. You can find Andrea on Instagram @andreamaraauthor

This is Andrea Mara at her heart stopping best. Someone In The Attic is a dark, creepy, twisty thriller full of clever misdirection that would make Hitchcock proud, but it’s also a moving and thought-provoking tale of regret and letting go of the past. A brilliant book.

Andrea Mara is a number one Sunday Times, Irish Times and Kindle bestselling author, whose books have sold more than one million copies across all formats. The TV adaptation of her 2021 book, All Her Fault, aired in November 2025 to huge critical and audience acclaim, with Sarah Snook (Succession) playing the lead. It became the most-watched TV show in America during the first week of its release. Her most recent novel, It Should Have Been You, won Irish Crime Novel of the Year at the 2025 An Post Book Awards. It was a No.1 bestseller in Ireland for six weeks, and a Top Ten Sunday Times bestseller in the UK. Her book No One Saw a Thing was a Sunday Times number one bestseller and has sold over half a million copies. Andrea lives in Dublin with her husband and three children. You can find Andrea on Instagram @andreamaraauthor

This is Andrea Mara at her heart stopping best. Someone In The Attic is a dark, creepy, twisty thriller full of clever misdirection that would make Hitchcock proud, but it’s also a moving and thought-provoking tale of regret and letting go of the past. A brilliant book.