The book "The Dream of Gerontius" is an oratorio poem written by the English writer and priest John Henry Newman. The work tells the story of a deceased man named Gerontius, who passes into a mysterious world after death. In this world, he encounters angels and demons, and a new understanding of his life and purpose opens up to him. The poem explores the themes of faith, salvation, death and eternity, giving the reader the opportunity to ponder the big questions of human existence. "The Dream of Gerontius" is highly regarded as a masterpiece of English religious poetry and philosophical literature.