Elly Griffiths is deservedly one of the most popular crime authors in the UK. Here is the start of a new series of time-travelling detectives: In The Frozen People, Cold Case detective Ali Dawson must travel to 1850s London to research sinister links in a politician's family history.
Fearing for her safety in the middle of a freezing Victorian winter, Ali finds herself stuck in time, unable to make her way back to her life, her beloved colleagues, and her son, Finn, who suddenly finds himself in legal trouble in the present day.
Written in Griffiths' usual style, this unusual combination of historical mystery with current-day police procedural is very engaging and draws the reader right into the mystery.