In subdued manner, an impressively clever job, with a perfect integration of crime, backgrounds, and characterization which gets its psychological due. The London Times heralds it as ""the best detective story of the year"" -- some American readers may find it a little British for general taste here, though connoisseurs will cherish it. How Emma Betony, a gentle, stubborn, retired governess accepts a post as teacher from a former charge, in an old house, which is part nursing home, part school. When attempts on the lives of one of the inmates, and the pervading influence of an hypnotist, and murder combine to force an issue, Miss Betony gathers the data for Scotland Yard's solution. Good going.