David Cassidy to Agatha Christie in 9 Steps
- David Cassidy recorded The Puppy Song
- The Puppy Song was written by Harry Nilsson
- Harry Nilsson wrote Mrs. Livingston I Presume
- Mrs. Livingston I Presume was published by Unichappell Music
- Unichappell Music published Angie's Suite
- Angie's Suite was produced by Rick Jarrard
- Rick Jarrard produced Ten Little Indians
- Ten Little Indians is partly inspired by And Then There Were None
- And Then There Were None is a novel by Agatha Christie