He himself wrote The Probability Pad (1970), a sequel to The Unicorn Girl; these two novels, together with Chester Anderson's earlier The Butterfly Kid (1967), make up the collaborative Greenwich Village Trilogy.
butterfly | Kid Rock | Madama Butterfly | Butterfly | Iron Butterfly | Billy the Kid | The Karate Kid (1984 film) | Butch Cassidy and the Sundance Kid | The Karate Kid | Swallowtail butterfly | Monarch butterfly | M. Butterfly | Kid Ory | Butterfly stroke | Alex da Kid | Kid A | Swimming at the 2013 World Aquatics Championships – Men's 50 metre butterfly | Sundance Kid | Kid Montana | Kid Galahad | Kid Creole and the Coconuts | Kid Carpet | Kid Auto Races at Venice | Ḳid. | I Know My Kid's a Star | The Tap Dance Kid | The Butterfly Effect | Star Wars Kid | Star Kid | Small Heath (butterfly) |