Showing Thrones, Dominations by Jill Paton Walsh

It is 1936 and Lord Peter Wimsey has returned from his honeymoon to set up home with his cherished new wife, the novelist Harriet Vane. As they become part of fashionable London society they encounter the glamorous socialite Rosamund Harwell and her wealthy impressario husband Laurence. Unlike the Wimseys, they are not in love - and all too soon, one of them is dead. A murder case that only Lord Peter Wimsey can solve.