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Title: The secrets of the trade
Review: This is a wonderful book which demonstrates how to approach a difficult problem, make order-of-magnitude estimates and guess the answer. I am generally surprised how little known this book is, given its value. The first 30 pages should be required reading for any undergraduate Physics major, and maybe not only Physics. Just look at the first example, Pythagoras's theorem by dimensional analysis, and you will see what I mean.
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