If you read his Foundation trilogy, you might be interested in this. His estate has authorized three writers to continue the saga with three new books:
Foundation's Fear; Foundation and Chaos; Foundation's Triumph.
I'm going to upload them on my Nook. The Foundation trilogy is what got me interested in science fantasy 30 some years ago
http://www.barnesandnoble.com/w/foun...=9780061056383
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