Amazon: http://amzn.to/1Ybf3oR 
Hard Science Fiction.
Realistic, plausible and gripping.
Classic Clarke.
Tag: space
My #top100 #scifi Num:64 Starship Troopers
Amazon: http://amzn.to/22U5lrM 
Don’t discount this book as pure chaotic, battle-suit, mayhem — although those bits are awesome.
It is also wise:
“Violence, naked force, has settled more issues in history than any other factor, and contrary opinion is wishful thinking at its worst.”
My #top100 #scifi Num:65 The Puppet Masters
Amazon: http://amzn.to/1U8zFeV 
Our world crawling with nasty little alien parasites.
These are the Futurama Brain Slugs… but less cuddly.