An excellent thriller/mystery with a twist. With several twists. The hero of some others of James' books, the poet/superintendent Adam Dalgliesh, apart from a brief and probably unnecessary appearance at the end of the book, is merely a brooding presence over the plot. Dalgliesh inspired Cordelia Gray's dead detective agency partner in every way, and his remebered quotes give Gray the ability to uncover the solution to the problem laid before her: Why did the young son of a very successful scientist drop out of Cambridge and commit suicide? Every character is coherent and supportable in their actions and words; every line and thread of the plot is believable and woven inexorably into the whole. This is detective writing at its best.