This book consists of lectures presented at the Nato Advanced Study Institute of the National Observatory of Athens, Cape Sounion, August 2–15, 1964. According to the editor, a well‐known physicist at the Air Force Cambridge Research Laboratories, one of the purposes of the Institute was to supply a written technical review of radio and radar astronomy as they relate to the physics of the solar system. Twelve chapters are devoted to the Sun, and two each to the interplanetary medium (but only the plasma component), the Moon, and the planets. From this chapter division, one can see that the planets receive short shrift as compared with what one might expect from a book on solar system radio astronomy. Furthermore, the chapter on planetary radio astronomy, by H. Weaver, is not a useful contribution, because bigger, better, and similarly up‐to‐date reviews of this subject have already been published. Also the omission of meteor astronomy from the book is regrettable.