Hungry Girl

Hank Stuever: WOODLAND HILLS, Calif. — The country's best-selling cookbook right now is for people who don't really cook, written by a hyperkinetic 43-year-old former TV producer named Lisa Lillien, who once upon a time hated the fact that she couldn't fit into her skinny jeans. "I was that person who would sit at the computer and eat an entire bag of fat-free pretzels and think I was doing a good thing," Lillien says. "I wasn't."

She lost 25 pounds eight years ago, and in 2003 she started sending her friends low-fat recipes and tips for finding healthful food in mainstream supermarkets. She then very smartly turned herself into a cartoon character on the Internet called Hungry Girl. Now…