The gripping, twisty thriller that everyone is talking about - the new novel from Andrea Mara, bestselling author of Richard and Judy Book Club pick, No One Saw a Thing.

‘An absolute page turner!’ Shari Lapena
‘A twisty thriller full of clever misdirection.' Claire Douglas
'Andrea Mara is the Queen of the Cliffhanger.' CL Taylor
‘I enjoyed every terrifying page.’ Elly Griffiths
‘A gripping story, beautifully told.’ Patricia Cornwell

No one suspects a thing.
When your daughter shows you a video of a masked man climbing out of an attic, you initially ignore her. But then you recognise the carpet, the stairs and the paintings. Your heart skips a beat, because the footage was filmed inside your house…

Someone wants revenge.
You’re certain no one could access this luxury gated community, designed to keep intruders out. But then the second video arrives – the same as the first – and you really begin to panic.

Everyone is hiding something.
Could someone be living in your attic? Why would a stranger target you? And what if it’s not a stranger at all?

Don't miss Andrea Mara's unputdownable new novel, Such a Nice Girl - available to pre-order now!

Everyone is talking about Someone in the Attic:

'This is her best book yet!' * * * * *
'The most gripping and thrilling book I've read in a long time.' * * * * *
'My favourite of Andrea’s so far!' * * * * *
'WOW! What a book!. * * * * *
'What a read!!!' * * * * *
'Bloody hell!' * * * * *
'Just amazing! * * * * *

Andrea Mara, Sunday Times bestseller, March 2024

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. * Claire Douglas *
This heart-thumpingly tense thriller may give you nightmares * Sun *
Someone is getting inside your house… It’s a chilling premise, and Andrea Mara executes it brilliantly. This one is an absolute page turner! * Shari Lapena *
Grabs you from the off and doesn't let you go… Andrea Mara is the Queen of the Cliffhanger. I guarantee that you won't be able to put this book down. * CL Taylor *
A gripping story, beautifully told. Andrea Mara is masterful. * Patricia Cornwell *
A genuinely chilling concept – told with skill, empathy, and wit. I enjoyed every terrifying page. * Elly Griffiths *
‘A tense, terrifying, guessing game. Someone in the Attic twists, thrills and chills. I loved it.’ * Chris Whitaker, New York Times bestselling author of We Begin at the End. *
Does for bathtubs what Psycho did for showers. A thriller honed to a fine point, sharp and keen and piercing; it's darkly comic, too, and uncommonly observant. This is suspense you can feel good about. * A. J. Finn *
Mara... lays out the pieces of the puzzle with diabolical wit, some good suspense and an unexpected note of sentimentality. * New York Times *
Fast-paced and chilling, you won’t want to sleep alone after reading it * Woman&Home *

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