This book is a vivid and exciting travel memoir as well as a detailed scientific field journal covering biology, geology, and anthropology that demonstrates the author’s keen powers of observation, written at a time when Western Europeans were still discovering and exploring much of the rest of the world. The author's five-year journey took him from the coasts of South America, Australia, and Africa to the South Pacific islands, during which he collected and documented the natural history of these areas. The voyage and the specimens he brought back would later form the basis for his famous theory of evolution.

Set in the 19th century, this novel follows a group of Englishmen who, driven by different motivations, set off on a voyage to Tasmania. The group includes a vicar who believes Tasmania is the site of the Garden of Eden, and a doctor who is interested in studying the 'inferior' races. When they arrive, they encounter the harsh realities of British colonial rule and the near-extinction of the native population. The story is told from multiple perspectives, including that of a Tasmanian man, which provides a broad view of the cultural and social complexities of the era.