Mr. Oppenheim never fails to entertain us.-Boston Transcript. P The author has acquired an admirable technique of the sort demanded by the novel of intrigue and mystery.-The Dial, Chicago. P Mr. Oppenheim is a past master of the art of constructing ingenious plots and weaving them around attractive characters.-London Morning Post. P By all odds the most successful among the writers of that class of fiction which, for want of a better term, may be called "mystery stories."-Ainslee's Magazine. P Readers of Mr. Oppenheim's novels may always count on a story of absorbing interest, turning on a complicated plot, worked out with dexterous craftsmanship.-Literary Digest, New York. P We do not stop to inquire into the measure of his art, any more than we inquire into that of Alexandre Dumas, we only realize that here is a benefactor of tired men and women seeking relaxation.-The Independent, New York.