* The Book of Flowers:A Visual History (1998)
* The Private Lives of Trees:A Celebration in Word and Image (2004)
* The Little Book of Trees:Twenty Inspiring Trees and Why They Matter (2019)
* The Art of Trees:An Illustrated Guide to the Trees of the World (2021)
Essays og artikler
* "The Secret Language of Trees" (The New York Times, 2012)
* "Hvorfor vi trenger trær" (The Huffington Post, 2013)
* "Verdens mest fantastiske trær" (Smithsonian Magazine, 2015)
* "Hvordan trær kan redde oss" (National Geographic, 2017)
* "Livets tre" (The Atlantic, 2019)
Andre skrifter
* The Tree Museum (barnebok, 2010)
* The Tree Book (kaffebordbok, 2014)
* The Tree Journal (veiledet journal, 2018)