Some of the eminent authorities who have prepared the text for these books are Havelock Ellis, the famous English expert on sexual psychology; James Oppenheim, a N.Y. practicing psycho-analyst; William J. Fielding, well-known for his recent book, “Sex and the Love-Life”; Dr. Morris Fishbein of the American Medical Association; Dr. Joseph H. Greer; Dr. Wilfrid Lay; Dr. Charles Reed; Professor C. L. Fenton, etc. Do not hesitate to rely upon these books; they are thoroughly up to date, containing the latest facts available. 50 Volumes-–750,000 Words Each of these books contains about 15,000 words of text, making 750,000 words in all. The books are of a convenient size (3½ × 5 inches) to fit the pocket, average 64 pages each, have easily readable type, and are bound in substantial stiff card covers. If these books were issued in ordinary library form they would cost from $25 to $30 for the set. But in this neat pocket-sized edition, due to mass production, they are offered for only $2.98, full and final payment for the entire 50 volumes and a leather cover. A Real Leather Cover Included with each set of 50 volumes, at no extra cost, is a genuine leather slip cover, made from high grade black levant leather. This cover holds one book at a time, protecting it while in use; a book may be slipped in or out in a few seconds. This cover has the added advantage that it can be slipped on a book to carry in the pocket, thus concealing the cover and title if anyone prefers to avoid possible embarrassment. Not only this, but you can enjoy the luxurious “feel” of real leather while reading these books. And remember—$2.98 is =positively all you pay= for 50 books and this leather cover. [Illustration] 50 BOOKS Sane Sex Facts for Everyone