Hjalmar Söderberg was a Swedish author born on October 20, 1869, in Stockholm. He is best known for his novels, plays, and essays, which often explore themes of love, existentialism, and the human condition. His most famous works include Doctor Glas and The Serious Game, which have been influential in Swedish literature. Söderberg's writing style is characterized by its psychological depth and social critique. He was also a prominent figure in the Swedish literary scene during the early 20th century, contributing to various literary magazines. He passed away on October 14, 1941, leaving a lasting legacy in literature.