Heaven and Hell by Emanuel Swedenborg is one of the most influential works of Christian mysticism and visionary theology, offering a detailed, firsthand account of the afterlife as revealed through Swedenborg’s spiritual experiences. Written in the 18th century but enduring in relevance, the book describes the structure of heaven and hell, the state of souls after death, the nature of angels and spirits, and the spiritual laws governing the universe. It has profoundly shaped spiritual thought, influencing writers, theologians, and seekers across centuries.