he Dupayne, a small private museum on the edge of London's Hampstead Heath devoted to the interwar years 1919-39, is in turmoil. The trustees--the three children of the museum founder, old Max Dupayne--are bitterly at odds over whether it should be closed. Then one of them is brutally murdered, and what seemed to be no more than a family dispute erupts into horror. For even as Commander Adam Dalgiesh and his team investigate the first killing, a second corpse is discovered. Clearly, someone at the Dupayne is prepared to kill, and kill again. The case is fraught with danger and complexity from the outset, not least because of the range of possible suspects--and victims. And still more sinister, the murders appear to echo the notorious crimes of th epast featured in one of the museum's most popular galleries, the Murder Room. For Dalgiesh, P.D. James's formidable detective, the search for the murderer poses an unexpected complication. After years of bachelorhood, he has embarked on a promising new relationship with Emma Lavenham--first introduced in Death in Holy Orders--which is at a critical stage. Yet his struggle to solve the Dupayne murders faces him with a frustrating dilemma: each new development distances him further from commitment to the woman he loves. The Murder Room is a story dark with the passions that lie at the heart of crime, a masterful work of psychological intricacy.