Entering new Sci-Fi Books

I've started working on the sci-fi section of the bookstore today. There were some embarrassing omissions there, like Isaac Asimov! (OMG! what happened here?) Also there was no Ray Bradbury, Arthur C. Clarke and so many others. I'm filling in the basics so that the store has a good foundation. Then I'll try an fill in some newer voices that I think are interesting like China Mieville, etc.