Back to Old school

I'd like to say War of the Worlds by H G Wells (Time machine pretty good, Invisible Man, not so) and grab a copy of the Sentinal by Arthur C. Clarke (a collection of short stories)

Reading these gives you an idea of old school thinking of Sci-Fi and highlight how bloody good these guys were. Reading the Sential will scare you when you see the dates they they were written and how close they are to modern reality.