'Sicker in the Head' will feature chats with Norman Lear, Kevin Hart and Whitney Cummings.

Judd Apatow likes nothing more than topping his own joke.

The filmmaker is putting together a sequel to his best-selling Sick in the Head, which featured conversations with Mel Brooks, Jerry Seinfeld and other comedians. The new book will be called Sicker in the Head and will feature interviews with Norman Lear, Kevin Hart and Whitney Cummings.

Random House, which announced the book Wednesday, said no release date has been set.

Apatow is best known for comedies such as Knocked Up and This Is 40, as well as HBO's Girls. He is donating author proceeds from his new book to charity.