Fred Hoyle was a remarkable scientist, and made an immense contribution to solving many important problems in astronomy. Several of his obituaries commented that he had made more influence on the course of astrophysics and cosmology in the second half of the twentieth century than any other person. This book found its basis in a meeting that was held in recognition of his work, and contains chapters by many of Hoyle's scientific collaborators. Each chapter reviews an aspect of Fred Hoyle's work; many of the subjects remain of key relevance. The chapters are not confined to the discoveries of Hoyle's own time, but also discuss research areas that were formed out of his pioneering work, particularly on the interstellar medium and star formation, the structure of stars, nucleosynthesis, gravitational dynamics, and cosmology. This wide-ranging overview will be valuable to established researchers in astrophysics and cosmology, and also to professional historians of science.