Although this book is primarily designed for laymen, physicians wül also find it an interestingly written, up-to-date account of the development of endocrinology and the sociological implications of synthetic, ovulation inhibiting, oral contraceptives. E. S. Singer, M. and Schade, J. P. (Editors): Mechanisms of Neural Regeneration. Progress in Brain Research XIII. Elsevier, Amsterdam 1964. 241 p. Price: Dfl. 40.-; sh. 80.