Wesley Stace, Charles Jessold, Considered as a Murderer (Picador, $15 paper). A bewitchingly clever historical thriller in which the lives and work of Peter Warlock, Constant Lambert, and Carlo Gesualdo are blended into the hair-raising tale of an unworldly music critic who writes an opera libretto for a flint-hearted composer who returns the favor in the most malevolent way imaginable. The author (better known in pop-music circles as John Wesley Harding) has done a virtuosic job of fusing fact with fiction, and the result is one of the few novels with a musical setting in which the background is rendered accurately. Absolutely not for musicians only, though those who already know the dramatis personae will be dazzled by the sure-footed skill with which Stace has put their real-life stories to novelistic use (TT).