Though today we know much more about Isaac Newton than we did, say, 50 years ago, he still remains something of a puzzle. Should we think of him as the founder of modern science or as "the last magician," as John Maynard Keynes argued in the 1930s? What are we to make of a man whose writings include extensive material on mathematics, physics, alchemy, and Biblical prophecy?

*Isaac Newton's Natural Philosophy* opens with a short essay on the history of Newton studies since 1850, highlighting the importance of the careful work on Newton's manuscripts undertaken by several scholars beginning in the 1960s. Of these, perhaps the most impressive is D. T. Whitehead's *The Mathematical Papers of Isaac Newton*, a monumental — and, at eight huge volumes, massive — work that has *still* not been absorbed by historians in general. (Alas, this has been allowed to go out of print, which is just too bad.)

This book is a collection of essays by Newton scholars. The first four deal with "motivations and methods," while the remaining six focus on specific aspects of Newton's celestial mechanics and mathematical physics. The last essay is by Richard Westfall (author of the best Newton biography available, *Never at Rest*). Westfall died before putting the final touches on the essay, so the book also includes a memorial tribute by I. Bernard Cohen.

This affordable paperback is recommended for anyone who is interested in understanding Newton's scientific work in its historical context.

Softcover, 376 pp., $22.00. ISBN 0-262-52425-2. Also available in hardcover ISBN 0-262-02477-2.

Fernando Q. Gouvêa is Professor of Mathematics at Colby College, editor of FOCUS and FOCUS Online, and co-author of Math through the Ages.