To Speak for the Trees: My Life's Journey from Ancient Celtic Wisdom to a Healing Vision of the Forest (Unabridged)
2019
Our Green Heart: The Soul and Science of Forests (Unabridged)
2024
The Sweetness of a Simple Life: Tips for Healthier, Happier and Kinder Living from a Visionary Natural Scientist (Unabridged)
2023
The Global Forest: Forty Ways Trees Can Save Us (Unabridged)
2025
The Trees I Love: My Personal Arboretum of Rare and Endangered Species (Unabridged)
2027