'You'll never see North Korea the same way again' Oliver Bullough, author of Moneyland

'One of the most incredible cyber-espionage stories I've ever heard' Jamie Bartlett, author of The Missing Crypto Queen

'Pacy and eye-popping' - Tom Burgis, author of Kleptopia

They have been accused of causing mayhem in Hollywood with 2014's infamous Sony hack.

They're allegedly behind WannaCry, a cyber-attack which brought NHS hospitals to a dangerous standstill.

And it has been claimed that they have stolen more than $ 1bn in an international crime spree.

They are the Lazarus Group, a shadowy cabal of hackers accused of working on behalf of the North Korean state.

From the streets of Dhaka to the casinos of Macau to the secretive capital of Pyongyang, this shocking story uncovers the secret world of the Lazarus Group, their victims and those who have tried - and so far, failed - to stop them.