Well, I ticked off the Foundation Trilogy by Asimov (always meant to read that).
Really enjoyed it. Then it turns out there is an empire series before that.....
So I am currently reading 'The Complete Robot' to be followed by the 'Robot series' then the 'empire series' then the 'foundation series' again.
With four other foundation books. All in the suggested order. That'll keep me quiet for a bit.