Rendell returns to her favorite psychological-suspense device here: two separate story-lines that will eventually overlap—with fatal results. And, also as before (Lake of Darkness, Master of the Moor), Rendell's quiet English setting harbors a surprising, slightly excessive number of criss-crossing nut-cases. The principal plot focuses on the London-suburb household of mousey businessman Harold Yearman, whose wife has just died—leaving behind a strange, devoted pair of siblings: Dolly, in her 20s, a withdrawn innocent, psychically scarred by a large facial birthmark; and her teenage brother "Pup," short and insecure, who becomes bookishly obsessed with witchcraft, casting spells in his mini-temple upstairs. But then, while Dolly (a wine alcoholic, ever more disturbed) comes to believe utterly in Pup's abracadabra, Pup himself soon grows taller, discovers sex—and no longer needs the occult outlet. Will he, nonetheless, keep doing magic for Dolly's benefit? Yes, he will—because he loves her. . . and because his supposed witchcraft-club meetings give him a cover for his many amorous assignations. (Dolly is shocked, jealous, at each hint of Pup's sex-life.) So, when father Harold marries the youngish, vulgar Myra, Dolly persuades Pup to cast an evil spell on their "wicked stepmother"—who does indeed quite promptly die. (The real cause: a botched attempt at self-abortion.) This, of course, only reaffirms Dolly's faith in Pup's powers. And when Dolly's new, first-ever friend, lovely Yvonne, reveals that her husband is deep in a homosexual affair, wacko Dolly—now hallucinating like crazy, hearing voices —insists that Pup come up with a spell to kill off Yvonne's gay rival. But it's Dolly herself who finally does non-magical murder. . . unhinged by jealousy (Pup and Yvonne pair off), alcoholism, paranoia, and—when Pup won't magically remove her birthmark —bitter disappointment. Where's the second story-line, you ask? Well, Dolly will predictably meet her violent end from a neighborhood maniac—whose psychotic doings are dropped in now and again. And this contrived subplot is a significant flaw here. But, if less masterful than the best Rendell psycho-suspense (Judgement in Stone, Make Death Love Me), this is a strong improvement over Master of the Moor—with genuine, haunting creepiness and achingly pathetic irony in the central portrait: an obsessed brother and sister, one surfacing to sanity while the other sinks ever deeper into madness.