Expand that to John Wydnham books in general. Very good author.
I was going to risk saying that, but I've only read Triffids and "The Chyrsalids", both excellent books though.
Somebody suggested Do Androids, but I'd say stay away from P.K dike until you've got into reading a little bit more. I love the man myself, but I know his books can baffle some people.