From the reviews: "'Tool Kits' is an intriguing phrase. Many readers will pick up this book for a quick look. ... describes tools at many levels of abstraction. ... The long list of references is also valuable. I learned something here. ... useful for some students. ... It is an erudite, and interesting, essay, and I recommend it. ... The book may well have something for you, and you should look it over at least briefly. ... Certainly I found various parts of the book useful." (Roger Bolton, Journal of Regional Science, Vol. 51 (5), 2011)