Ray Bradbury is one of the more unusual authors around. He's usually called a Science Fiction writer, but his books have come from almost every genre. More of his stories have a strong Horror theme, hints of which show up in many of his non-Horror tales.
Bradbury was born in Waukegan, Illinois (known as Green Town in Dandelion Wine) in 1920. He wrote for pulp magazines in the 1940s, including Amazing Stories and Weird Tales. He had published some collections of dark stories in the 1940s. In 1950,he published Martian Chronicles, which may initially have tagged him as an SF writer. When you read those stories, you realize he's writing about people, not about science. After that, he published Illustrated Man and Fahrenheit 451, both nominally SF titles.
If you read more of his later works, such as Medicine for Melencholy or Something Wicked This Way Comes, you realize he always writes about people - how they interact with each other, and sometimes how they interact with technology, or how technology interacts with them.
Bradbury had written more than 30 books, 600 short stories, and writes poetry, essays, and plays.
Bradbury's authorized biography is The Bradbury chronicles : the life of Ray Bradbury, by Sam Weller.