Ha colaborado con
- Andy Bannister — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Andy Moore — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Andy Steiger — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Clare Williams — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- David Nixon — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Gareth Black — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Gavin Matthews — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Mary Jo Sharp — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality
- Michael Ots — en Have You Ever Wondered?: Finding the Everyday Clues to Meaning, Purpose & Spirituality