The Invention of Nature. Alexander von Humboldt's New World (forthcoming 2015, published in the UK, US, Germany, and Portugal.
Chasing Venus. The Race to Measure the Heavens (2012 published in the UK, US, Italy, Germany, the Netherlands, Sweden, Japan and Brazil.
click here for Chasing Venus reviews
The Founding Gardeners. The Revolutionary Generation and the Shaping of the American Nation (2011, published by Knopf and William Heinemann)
Click here for Founding Gardeners reviews
The Brother Gardeners. Botany, Empire and the Birth of an Obsession
UK paperback February 2009
Winner of American Horticultural Society 2010 Book Award
Longlisted for the Samuel Johnson Prize for Non-Fiction
US edition 30 March 2009
This Other Eden Seven Great Gardens and Three Hundred Years of English History