A powerful, innovative and gripping thriller for the social media age. Now a major TV series for Channel 4 and Netflix.

SHORTLISTED FOR THE GUARDIAN FIRST BOOK AWARD

On the internet, we can be anyone we choose. No one knows who we really are. Sheltered and obsessive, Leila spends more time online than out in the real world. So she seems the ideal person to take over the virtual identity of the vivacious and fragile Tess, who wants to disappear. But even with all the facts at her fingertips, there are things that Leila can't possibly know about Tess - or herself - until it is too late . . .

'The first coming-of-age novel for the internet generation' Glamour

'Unnervingly claustrophobic and enormously moving' Guardian

'Dubbed this year's Gone Girl . . . electrifying' Psychologies

'Original and unsettling . . . brilliantly twisty' Irish Times

'A brave, poignant and humane novel about society's taboos - and the cost of breaking them. Lottie Moggach has put her finger to the pulse of our times.' Liz Jensen, author of The Rapture