Died today in Sri Lanka, aged 90.
I must add his Three Laws of Prediction to my quotes database:
1. When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong.
2. The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
3. Any sufficiently advanced technology is indistinguishable from magic.
I read all his fiction books during my teens. The City and the Stars and The Fountains of Paradise were probably my two favourites. What were yours?