As a writer of fiction who bases work on Greek mythology, this is my most frequently consulted reference. Graves focuses on the sources of the myths as well as the myths themselves, puts them into context with contemporary culture and history, and also puts them into context with each other. The index, maps, cross-references, and the organization of the book as a whole are invaluable to me as a writer and a student of Greek and Roman mythology. Graves' writing is precise and evocative, as well. I've underlined, dog-eared, and completely worn out my first copy and will be purchasing a second for more "casual" reading.