"You know, some of the people I go up against in the auction ring, they own countries," says Bobby Flay with a chuckle. "And I work at a stove." It's an instructive remark. For one thing, it indicates the humor and modesty that redeem the restauranteur and television chef from the kind of airs that might burden others, accustomed to turning heads in Main Street, on entering this arcane hinterland of ours. Flay so reliably checks the fame and glamor at the barn door, indeed, that you suspect he actually...