Frederick Pough, author of the classic A Field Guide to Rocks and Minerals, died on this date in 2006, aged 99. The little rock book he first published in 1953 has been a mainstay for generations of rockhounds and geologists. In my review, I said, "This old friend to generations of geologists and mineral hounds is both authoritative and readable--and includes physical and chemical tests for every mineral. If I had to discard all but one geology book, I'd keep my Field Guide."
Of course, it's still in print as the First Guide to Rocks and Minerals in the Peterson Field Guides series. But older editions can be found in used-book stores. That's where I found a deluxe leather-bound version, edged in gold leaf, of the fourth (1976) edition published as a "collector's lifetime edition" in 1985. So I passed along my previous copy, shown in this photo, and I hope it's teaching someone else what it has taught me.
Geology Guide photo