"The Lost Step" is a novel by French author André Gide, published in 1927. The story follows a composer named Marcel who embarks on a journey into the South American jungle in search of a primitive society. His quest reflects a deep exploration of civilization versus nature and the search for authenticity. As Marcel ventures deeper into the wilderness, he encounters various characters and experiences that challenge his beliefs about modern life. The narrative delves into themes of existentialism, the conflict between progress and tradition, and the quest for meaning in a rapidly changing world.