I Guess the Lord Must Be in New York City to Agatha Christie in 10 Steps
- I Guess the Lord Must Be in New York City was written by Harry Nilsson
- Harry Nilsson wrote Mr. Richland's Favorite Song
- Mr. Richland's Favorite Song was arranged by George Tipton
- George Tipton arranged Cast And Crew
- Cast And Crew was published by Six Continents Music
- Six Continents Music published The Tree
- The Tree 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