Henry is a journalist, author and broadcaster, specialising in evolutionary biology, conservation and history of science. His first book Lonesome George: The Life and Loves of a Conservation Icon was about the Galapagos Archipelago and global conservation.
He is also the author of The Way of the Panda: The Curious History of China's Political Animal, which charts the intertwined fortunes of giant pandas and China over the last 140 years. His third book, released in early 2014, is The Galapagos: A Natural History.