Book review in this Article:ANONYMOUS LETTERS: A STUDY IN CRIME AND HANDWRITING. By Robert Saudek.THE PSYCHOLOGY OF EFFECTIVE SPEAKING. By T. H. Pear.PSYCHO‐ANALYSIS AND ITS DERIVA‐TIVES. By H. Crichton‐Miller. The Home University Library of Modern Knowledge. New YorkHUNDRED YEARS OF PSYCHOLOGY. By J. C. Flugel.PSYCHO‐ANALYSIS TODAY. Edited by Sandor Lorand. LondonTHE TIDES OF LIFE. By R. G. Hos‐kins. New YorkFOOD AND CHARACTER. By Louis Berman. Boston and New YorkNIETZSCHE, THE GOOD EUROPEAN By H. L. A. VisserPsYKOANALYSE. By Sigurd Naes‐gaard.WORLD CHAOS. By Willia