DISCOVER THE NEW UNPUTDOWNABLE PSYCHOLOGICAL THRILLER FROM THE NO.1 BESTSELLER

‘An absolute page turner!’ Shari Lapena
‘A twisty thriller full of clever misdirection' Claire Douglas

A fresh start. A safe neighbourhood. Or is it?

You've moved back to your hometown, into a luxury gated community that's designed to keep intruders out. You think your family is safe, but you couldn’t be more wrong.

Your nine-year-old son says there’s a man living in the attic.

You keep hearing noises up there when you’re all alone, but when you check, the loft space is empty.

And then your daughter shows you something on her phone – a video of a man walking around inside your house while no one is home – and you start to panic.

Why would a stranger target you? Unless they’re 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:

'I enjoyed every page' Elly Griffiths

'Heart-thumpingly tense' Sun

'Someone in the Attic twists, thrills and chills. I loved it’ Chris Whitaker

'This book is SO GOOD' Louise O'Neill

'The Queen of Cliffhangers' John Marrs

'I couldn't put it down' Fiona Cummins

'Addictive' Good Housekeeping

'Full of twists and surprises' Jane Casey

'This is her best book yet!' * * * * * Reader review

'The most gripping and thrilling book I've read in a long time.' * * * * * Reader review

'My favourite of Andrea’s so far!' * * * * * Reader review

'WOW! What a book!. * * * * * Reader review

'What a read!!!' * * * * * Reader review

'Bloody hell!' * * * * * Reader review

'Just amazing! * * * * * Reader review

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