E B Paul Amsterdam: North-Holland 1969 pp xiv + 494 price £5 17s The fields of nuclear and particle physics have developed so extensively in the past 25 years that one is faced with a dilemma when writing a textbook on the subject. On the one hand, a teacher of the subject will wish to instruct, if possible, from first principles and, on the other, will feel bound to draw students' attention to a very wide selection of topics so that they are informed in breadth about the field.