This is Jon Scieszka. He's written TONS of funny books. Like The True Story of the 3 Little Pigs. And The Stinky Cheese Man. And the Time Warp Trio books. And you can get a great deal on his latest books, Knucklehead or Guys Read.
He was very happy to have his picture taken with Cathy-on-a-Stick. (Don't pay any attention to that look on his face. That's his "extremely happy" expression. Trust me.)