To Dwell in Darkness by Deborah Crombie

Detective Superintendent Duncan Kincaid, recently returned from paternity leave, has been demoted to the Holborn Police Station from Scotland Yard. When a young man dies while setting off a bomb in the St. Pancras underground, Duncan and his team try to discover his identity and motive.  On the home front, Duncan and his wife, DI Gemma James, wrestle with disappointing their three children, who want to keep all five kittens that the stray cat they've found gave birth to. In To Dwell in Darkness, the personal lives of Duncan, Gemma, their children, and colleagues Doug and Melody are given equal footing to the mystery. It will be published next month.