Looking for Sci-Fi book for ESL

Hi,

I'm a French living in UK and I'm looking for a Sci-Fi book easy to read (my English level is not very good...).

I used to read Fantasy books like Game of Thrones (in French) or Harry Potter (in English).
I prefer a book I didn't already see as movie.

Thanks for your recommendations!

Dush

Some suggestions:

Childhood's End by Arthur C. Clarke
Caves of Steel by Isaac Asimov
Old Man's War by John Scalzi
Armor by John Steakley
The Windup Girl by Paolo Bacigalupi
The Mote in God's Eye by Larry Niven and Jerry Pournelle
Snow Crash by Neal Stephenson
Halting State by Charles Stross
Rule 34 by Charles Stross