"The Song of the Dodo" is a compelling exploration of the science and history of island biogeography, a field that examines the rich, yet often perilously fragile ecosystems of islands. The book delves into the stories and research of early scientific explorers like Charles Darwin and Alfred Russel Wallace, who developed foundational ideas about natural selection and species distribution from their observations on islands. Through engaging narrative and detailed analysis, the book discusses how island environments have become crucibles for evolutionary processes, and how the extinction of species on islands serves as a dire warning for the ecological challenges facing the entire planet.

"The Sea and The Jungle" is a travelogue that recounts the author's experiences aboard a steamship traveling from England to South America and then along the Amazon and Madeira Rivers. The narrative vividly captures the harsh realities and stunning beauty of the natural world, as well as the challenges and peculiarities of life at sea and in the jungle. Through evocative prose, the author explores both the physical journey and the philosophical reflections it provokes, offering insights into human nature and the impact of civilization on the wilderness.