This book is sewed together into seven chapters of 200 pages and another 100 pages of appendices. Because this reviewer knows both of these eminent oceanographers, it is straightforward to assign an author to each section. Computer Modelling contains much useful information, but it would not work well as a textbook in an Earth system modeling class either for the atmosphere or the ocean. Experienced numerical modelers will find some nice discussion of old and modern concepts. The text contains lengthy discussions of the authors’ philosophies with regard to models. It is unusual to find such opinions in a text.