Mr. Oppenheim never fails to entertain us.—Boston Transcript. The author has acquired an admirable technique of the sort demanded by the novel of intrigue and mystery.—The Dial, Chicago. Mr. Oppenheim is a past master of the art of constructing ingenious plots and weaving them around attractive characters.—London Morning Post. 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. 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. 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.