Derrick Niederman has a Phd in mathematics and was an economist for a few decades. He now makes puzzles for companies, as well as writing some of the New York Times crossword puzzles. Which all on its own is impressive but not nearly as interesting as this little gem of a book. While I've read many ...
Very interesting, if you like random factoids about numbers and math, which I do. Doesn't explain anything in depth but it would be easy enough to find a new subject to be interested in these pages and then explore it more fully elsewhere!
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