DEATH LOVES A SHINING MARK

Austen of the Yard, on an Army mission in Egypt, is momentarily de-routed by the murder of the lovely, flagrant Flavia, and the subsequent death of her small child. A much older husband, two lovers, and the fiancee of one of them, are suspects in a crime of emotional entanglements. Methodical -- matter of fact unravelling of clues.