Read about the other books on the list.The Evolution of Useful Things by Henry Petroski
The zipper takes its place among other items we couldn't get along without such as the paper clip and Scotch tape in Petroski's book. The author discusses the answers to questions about inventions we may have never thought to wonder about, like why a fork has a fourth tine.
The Page 69 Test: Henry Petroski's The Toothpick.
--Marshal Zeringue
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