This gripping true story follows British explorer Percy Fawcett's relentless quest to find a legendary ancient civilization deep in the Amazon jungle, which he called 'Z.' Journalist David Grann retraces Fawcett's footsteps over a century later, uncovering the mystery of his disappearance. The book weaves together two adventures—Fawcett's original expeditions and Grann's modern investigation—highlighting the dangers of obsession and the secrets of the Amazon. It explores how the search for a lost city became a puzzle that consumed many lives.