Librarians familiar with the name of Harry Sootin will recognize his penchant for two styles of writing, the biographical man-of-science style at which he excels, and the activities-and-experiments style in which he is always interesting. In this one on magnets he presents first a pair of pages devoted to facts and information about an area followed by a pair of pages heavily illustrated and very action oriented. In the first set Mr. Sootin recognizes the necessity to know something before one can productively investigate an area but in the second set he allows his reader to explore for himself with carefully cryptic suggestions. It would be difficult to single this book out for special notice since there is no dearth of activity-oriented books on electricity and magnetism specifically and since all of the many, many science experiment books have sections on the topic, but this one is a notch above the usual. The selections are more judicious in that they are meaningful in terms of the subject whereas too often the choice is restricted to those topics that can be interestingly handled with little thought to the overall discipline.