From really good literature (Greene) to a really good story, with lots of science thrown in to boot. I read Fred Hoyle's The Black Cloud way back in 1976, during third form at Ysgol Glan-Y-Mor in Pwllheli, in company with a couple of friends (Howard Hughes & Andrew Harangozo). As I recall, we were enthralled by the story - it was, for us, real sci-fi; plenty of science, no fantasy elements.
In the years that followed I read most of what Sir Fred wrote - both on his own and in collaboration with his son, Geoffrey (I mean I read his sci-fi books, not his astronomy papers).
For anyone interested in a plot summary, click here.
I'd love to get hold of a copy just to re-read what first opened my eyes to a new genre of writing (new to me, I mean).