The Pencil: A History of Design and Circumstance by Henry Petroski
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Originally published in 1990, you will probably find everything you ever wanted to know about pencils, their history, manufacture and craftsmanship in this whooper of a book. It's not a history textbook though, it's not at all stale and is likely to be very entertaining if you're of the pencil worshipping type.
Seventeenth reprint, 2014
Published by Knopf, New York