His first hardcover book , Brain Droppings ( 1997 ) , sold nearly 900,000 copies .
His first hardcover book , Brain Droppings ( 1997 ) , spent 40 weeks on the New York Times best - seller list .
His first hardcover book , Brain Droppings ( 1997 ) , sold nearly 900,000 copies and spent 40 weeks on the New York Times best - seller list .