African forests and their inhabitants have a unique allure for many people. This is especially true for the great apes. An encounter with these animals in the wild leaves a lasting impression on everyone—particularly the researchers who spend many years in the rainforest. Here, ten scientists share their experiences, which they have documented in their diaries. Their adventures with the great apes are both thrilling and thought-provoking. They provide insights into the current state of research and demonstrate that science can still be an adventure today. "I read the book in one go.".