When Commander Dalgliesh is persuaded to visit the Dupayne, a private museum on the edge of Hampstead Heath, he has no idea that he will return a week later under very different circumstances. One of the family trustees has been horribly murdered and Dalgliesh is called in to investigate. Neither the mystery nor the detective present Jamess followers with anything truly new in her latest Adam Dalgliesh novel (after 2001s Death in Holy Orders), which opens, like other recent books in the series, with an extended portrayal of an aging institution whose survival is threatened by one person, who rapidly becomes the focus of resentment and hostility. Neville Dupayne, a trustee of the Dupayne Museum, a small, private institution devoted to England between the world wars, plans to veto its continuing operation. After many pages of background on the museums employees, volunteers and others who would be affected by the trustees unpopular decision, Neville meets his end in a manner paralleling a notorious historical murder exhibited in the museums Murder Room. MI5s interest in one of the people connected with the crime leads to Commander Dalgleish and his team taking on the case. While a romance develops between the commander, whos even more understated than usual, and Emma Lavenham, introduced in Death in Holy Orders, this subplot has minimal impact. A second murder raises the ante, but the whodunit aspect falls short of Jamess best work. Hopefully, this is an isolated lapse for an author who excels at characterization and basic human psychology.