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.

"Brazilian Adventure" is a lively and humorous travelogue that recounts the author's participation in an expedition to the Brazilian jungle in search of the lost Colonel Percy Fawcett, who vanished while searching for an ancient lost city. The narrative, filled with wit and irony, details the challenges and peculiarities encountered by the group, ranging from bureaucratic hurdles to the harsh realities of jungle exploration. Despite the expedition's failure to find Fawcett or the mythical city, the book provides an engaging and insightful look at both the allure and absurdity of early 20th-century adventure expeditions.

"In Trouble Again" is a thrilling adventure narrative that takes the reader through the author's perilous journey into the Amazon jungle. The author, along with his eccentric travel companions, embarks on this expedition to find the indigenous Yanomami tribe, known for their violent tendencies. The book is filled with humor, danger, and fascinating insights into the customs, beliefs, and daily life of the Yanomami people, providing an engaging and unique perspective on one of the world's most remote regions.

This novel is a vibrant, multi-layered work that weaves together three separate narratives across different time periods in Brazil. Set in the past, present, and future, it explores the country's complex history, culture, and identity through the lives of a reality TV producer in contemporary Rio de Janeiro, a Jesuit missionary in 18th century Amazonia, and a future technology entrepreneur in São Paulo. The story delves into themes of quantum physics, media manipulation, and the interconnectedness of human lives, all while showcasing the rich, diverse tapestry of Brazilian life. Through its intricate plot and vivid descriptions, the book presents a speculative fiction masterpiece that challenges the boundaries of time, space, and reality.