Grey Mask — Patricia Wentworth

PATRICIA WENTWORTH'S ALTER EGO, MISS MAUD SILVER, IS THE CLEVER CRIME-SOLVER OF DIABOLICAL CASES OF DECEIT, MURDER, AND MISTAKEN IDENTITY. A PRIVATE DETECTIVE SINCE HER RETIREMENT AS A GOVERNESS, MISS SILVER'S SIMPLE WARDROBE AND DANCING KNITTING NEEDLES FOOL THE UNWARY OFFENDER, AND HIDE THE KEEN MIND OF A CAREFUL INVESTIGATOR WHO SEES DEEP INTO THE DARK SIDE OF THE HUMAN HEART.

After Charles Moray was jilted at the altar by Margaret Langton, he discovers that she is mixed up in a vicious kidnapping plot masterminded by a sinister figure in a grey mask. Charles turns to Miss Silver to uncover the strange truth behind Margaret's complicity, and the identity of the terrifying and mysterious individual behind the grey mask.