In the Yahoo article on the death of Ray Bradbury, we find this paragraph:
He attributed his success as a writer to never having gone to college–instead, he read and wrote voraciously. “When I graduated from high school in 1938, I began going to the library three nights a week,” he said in an interview with The Paris Review. “I did this every week for almost ten years and finally, in 1947, around the time I got married, I figured I was done. So I graduated from the library when I was twenty-seven. I discovered that the library is the real school.”
Read the Yahoo article for yourself. Additionally, you may want to see the MVCC library holdings on all things Bradbury.