The book by the outstanding German thinker Ernst Jünger (1895–1998) is a collection of sketch essays from the Weimar Republic era, balancing on the verge of a fictitious diary and a political manifesto. The lonely and brave heart of the adventurer lives among disasters, where the old values and hierarchies of the burgher world perish. “The dreamscapes blazing with fire” of the First World War lifted the veil for the author, behind which was hidden a demonic world, impenetrable to the daylight of the mind, and so the dream, where the amazing and magical is dreamed, becomes for Jünger a paradigm for interpreting the experience of reality. The state of modern civilization is a confused dream. Mysterious images of the monotonous movement of technology, the symbolism of death, the invasion of the burgher world by destructive demonic forces - this entire “night side” of life, described in detail in “The Heart of an Adventurer,” is deeply connected not only with the experience of war, but also with the life of a big city .The second edition is supplemented by a translation of Jünger’s essay “The Sicilian Letter to the Moon Man” and a new afterword by the translator. The publishing design is preserved in PDF A4 format.