"I found it a very useful exposition of ideas which I had known about in otherwise unrelated contexts. The relationship they have brought out between interacting eddies in two-dimensional turbulence flows generated by oscillated bodies is straightforward but not obvious, and it does help to have them treated in such a coherent and logical manner...The neat experimental methods developed to illustrate the flows and make graphic comparisons with theory also make this a visually appealing book which I can recommend to anyone interested in obtaining a clear physical understanding of vortex dynamics."-Journal of Fluid Mechanics