In Chapter 18 of his book Palm Sunday, "The Sexual Revolution", Vonnegut grades his own works. He states that the grades "do not place me in literary history" and that he is comparing "myself with myself." The grades are as follows:
Player Piano: B
The Sirens of Titan: A
Mother Night: A
Cat's Cradle: A-plus
God Bless You, Mr. Rosewater: A
Slaughterhouse-Five: A-plus
Welcome to the Monkey House: B-minus
Happy Birthday, Wanda June: D
Breakfast of Champions: C
Slapstick: D
Jailbird: A
Palm Sunday: C