* 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:En illustrerad guide till världens träd (2021)
essäer och artiklar
* "Trädens hemliga språk" (New York Times, 2012)
* "Why We Need Trees" (The Huffington Post, 2013)
* "Världens mest fantastiska träd" (Smithsonian Magazine, 2015)
* "How Trees Can Save Us" (National Geographic, 2017)
* "Livets träd" (The Atlantic, 2019)
Andra skrifter
* Trädmuseet (barnbok, 2010)
* The Tree Book (soffbordsbok, 2014)
* The Tree Journal (guidad tidskrift, 2018)