Two decades ago, Oxford University Press invited David Foster Wallace, Zadie Smith, Simon Winchester and five other distinguished writers, as well as one bookish journalist, to contribute usage notes to the then-forthcoming Oxford American Writer’s Thesaurus. While the monetary compensation wasn’t extravagant, the publisher sealed the deal with one irresistible perk: Each of us was given the 20-volume 1998 second edition of the Oxford English Dictionary.