It's Not What You Think: Escape with the gripping new psychological thriller for 2026, an instant number one Sunday Times bestseller

The instant No.1 Sunday Times Bestseller!

‘I always see the twists coming – but not this time’ LEE CHILD

'Madly twisty and super pacy and so so clever' LISA JEWELL

'So addictive it should come with a warning’ ALICE FEENEY

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YOU THINK YOU KNOW THE PEOPLE YOU LOVE

Nadeeka is certain Jamie is having an affair. She knows the tell-tale signs.

She’s been here before.

YOU THINK YOU KNOW WHO YOU CAN TRUST

When Jamie claims to be at work late, she knows he’s lying. He’s with another woman, and she’s determined to catch him in the act.

YOU THINK YOU KNOW HOW THE STORY ENDS

But when Nadeeka arrives home to confront him, Jamie can't explain himself. The house has become a crime scene…

Jamie is dead.

IT’S NOT WHAT YOU THINK

**Don't miss Clare's next breathtaking thriller You Don't Know Me at All, available to pre-order now!**

Praise for IT'S NOT WHAT YOU THINK:

'A nail-biter of a thriller' SHARI LAPENA

‘I finished it in a day unable to put it down … jaw-dropping twists’ CLAIRE DOUGLAS

'An extraordinarily clever plot, this was one of my favourite books of the year’ ANDREA MARA

‘Clare Mackintosh has done it again with another unguessable twist’ ERIN KELLY

‘The book everyone will be talking about … more twists and turns than an episode of Line of Duty’ C.L. TAYLOR

'the less you know about this book the better, so all we'll say is buckle up – the ride is wild' HEAT

'So clever and totally addictive' FABULOUS

'a clever thriller full of twists' ABIGAIL DEAN

‘The best twist I’ve read all year’ HOLLY SEDDON

‘Her best thriller yet … What a triumph' JILL MANSELL

Clare Mackintosh's book 'It’s Not What You Think' was a No.1 Sunday Times bestseller w/c 2026-03-30.