전도서, also known as Ecclesiastes, is a book in the Bible that is part of the Old Testament. Traditionally attributed to King Solomon, it explores themes of life's meaning, the inevitability of death, and the pursuit of happiness. The author reflects on the futility of human endeavors and the transient nature of worldly pleasures. The book is known for its philosophical tone and often poses rhetorical questions about the purpose of life. It emphasizes the importance of enjoying simple pleasures and finding contentment in the present moment, despite life's uncertainties and challenges.