Book 6 in the bestselling time-travel series which has sold over a quarter of a million copies. Liam, Maddy and Sal are being hunted by cyborg assassins from the future, so they take refuge in the streets of Victorian London. But Jack the Ripper isn't the only dangerous thing on the prowl... they're about to make a startling discovery, one that could change }everything{. 'A thriller full of spectacular effects' }Guardian{