It is stated in the preface that the material of this _Practical Guide to Efficient Living_ has been used extensively as a correspondence course, so that anyone who is thinking of paying pounds to be taught by post how to be efficient can save most of his money. All the most notable authorities on Efficiency--Ike Marvel, Buddha, Arnold Bennett, Walter Dill Scott, Prentice Mulford, Yoritomo-Tashi, and Baudelaire (to what the last-named said is added what he might have said)--are quoted, and many varieties of type and a liberal use of capital letters add to the strenuousness of the book. There is much about Ideals ("Ultimate and Other Ideals") and much about Money, much about Character Formation and much about Vocational Efficiency. We attribute our own inefficiency largely to the fact that we cannot whistle, for this seemingly trivial accomplishment is of far-reaching use--"Whistle and wear a smile for fifteen minutes, and you will most assuredly begin to feel cheerful"; "Sing and whistle as you dress." But, again, we have not done the essential thing, which is, we are told, to read the lessons of the Course again and again, and to devote close thought to them. Alas, we fell a victim to Waning Will, a fault early handled in the book, and although somewhat comforted to learn that it is a "common form of weakness," we could not bring ourselves to adopt the cure, which is "When a resolution is formed, record it definitely in your file under the head of Ideals, Aspirations, Tasks, Duties, or other appropriate designation." The appropriate designation for the reading of this book is undoubtedly Task. The author, who has also written books entitled _Efficiency_ and _The Psychology of a Sale_, is a man who has evidently obeyed his own great precept, "Don't admit any limit to your attainment and capacity." His intense self-respect will prevent him feeling hurt on learning that a smile is the only aid to efficiency which we have derived from his book. ANAPHYLAXIS AND ANTI-ANAPHYLAXIS. By DR. A. BESREDKA. English Edition by S. Roodhouse Gloyne. Heinemann. 6_s._ net.