Mad about the boy?

the long version

"It is midsummer 1923 and Isabelle's parents are celebrating their silver wedding with a fabulous ball at their country house, Hesperus, in Sussex. Isabelle has a dilemma some might envy: two men, the glamorous Malcolm and the quiet, troubled Arthur, are both in love with her. But her romantic difficulties are quickly forgotten when tragedy occurs. One of the guests apparently commits suicide at the ball. Jack Haldean, the hero of A Fete Worse than Death, believes it's murder, and further complications ensue when a group of Russian revolutionaries become involved in the affair." "In a case involving greed and jealousy, kidnap, torture and more deaths, Jack faces an agonizing choice on his journey to the truth - a journey which will change Isabelle's life forever."--BOOK JACKET.