The iconic Life trilogy by David Attenborough's third and last updated version. The study of animal behaviour, or ethology, is covered in The Trials of Life. Life on Earth covered evolution, Living Planet, ecology, and now ethology. Simply put, "This is the best thing I've ever done." The TV show The Trials of Life, which served as the inspiration for this book, starred Sir David Attenborough. It completes Sir David's examination of the animal kingdom that began with Life on Earth and continued with Living Planet. This is the third and final of Sir David's big natural history books based on his TV series.