VIOLENCE PASSION TERROR There was a streak of madness in the ancient and honorable Devereux family. No one, not even the family doctor, could tell when, or in whom, it might make its ugly appearance. Their own grandmother said of the two beautiful Devereux girls: "One of my granddaughters is all right But I've been worried about the other since she was a little child." Now one of the girls was dead, murdered. And no one knew which of the sisters—the dead Margot, or the lovely, living Celia— was a cunning, sexually deranged, exceedingly dangerous madwoman. ♦THE SLEEPING SPHINX-JOHN DICKSON CARR AT HIS BEST!"