The Killing Time by Elly Griffiths (Signed Copy pre-order)

Ali Dawson is a police detective who leads a unit that investigates cases so cold her team must travel to the distant past to solve them. But Ali and the team haven’t been allowed to time-travel ever since their technical expert, Jones, got stuck in Victorian London, never to be seen again. To distract herself from meaningless tasks, Ali decides to look into a present-day case – an apparent suicide of a young man who fell to his death from a high building.384pp