"World Scientific has made available a collection of Leo's reviews, essays columns and commentaries which is a feast in several senses: the strategy and tactics of science, the science itself, the history of several important developments in science, and as a bonus a beautifully illustrated collection of essays on computational science. The average reader may find this, the final section of the book, most interesting, but for me the account of his discovery of scaling, for which, inexplicably, he did not receive the Nobel prize, is most intriguing. Leo's combination of verve, frankness and insight makes this a very good read".P W AndersonPrinceton Univ".Publication of this volume will be very useful, especially for young readers. The papers disseminated over many journals acquire a new quality by being collected together. Readers not only can see a result in its final form, but also can trace its evolution".J Fluid Mechanics, 1994"The book is an invaluable source of information and inspiration ona variety of important problems in modern physics".EMS, 1999