June 20 to Agatha Christie in 11 Steps
- June 20 is the birthday of Diane Nilsson
- Diane Nilsson was the secretary of the fan club for the Family Tree
- The Family Tree was a band led by Bob Segarini
- Bob Segarini is also known as Joseph Segarini
- Joseph Segarini wrote Miss Butter's Lament
- Miss Butter's Lament was published by Six Continents Music
- Six Continents Music published Mr. Richland's Favorite Song
- Mr. Richland's Favorite Song 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