R.I.P. Ray Bradbury, Author of Fahrenheit 451 and The Martian Chronicles 
He was the last of the giants, along with Heinlein, Clark and Asimov. As a kid in the 70s, I devoured their novels and stories from the 50s and 60s. Bradbury was probably the most sophisticated writer of the four, though I preferred Asimov's straightforward, techie prose more back then. But we did get to read Bradbury in school, while none of the others was deemed lofty enough for the curriculum (except Heinlein's Stranger in a Strange Land, and that wasn't until college).