The Necklace of Skulls — Ivor Drummond

Lady Jennifer Norrington, Colly and Sandro travel to India to uncover a drug-stealing operation which develops into something altogether more horrible and frightening. Jenny is caught and used as bait for the others by the perpetrators of a long series of religious murders that was thought to have been stamped out in the nineteenth century, but as an organisation still survives. This wholly credible tale is set against exotic backgrounds and contains the kind of detail readers have come to expect of Drummond. It is a true suspense novel in all of the best traditions, with plot and sub-plots and many surprises.