If you liked the movie Gravity, starring Sandra Bullock and George Clooney, you might like these Sci-Fi books (as recommended by NPR):
Ender's Game by Orson Scott Card: Young Andrew "Ender" Wiggin, bred to be a genius, is drafted to Battle School where he trains to lead the century-long fight agains the alien Buggers.
Neuromancer by William Gibson: Case, a burned-out computer whiz, is asked to steal to steal a security code that is locked in the most heavily guarded databank in the solar system in this cyberpunk novel.
The Watchmen by Alan Moore and Dave Gibbons: As former members of a disbanded group of superheroes called the Crimbeusters start turning up dad in this graphic novel, the remaining members of the group try to discover the identity of the murderer before they, too, are killed.
Stranger in a Strange Land by Robert A. Heinlein: Valentine Michael Smith, born and raised on Mars, arrives on Earth stunning Western culture with his superhuman abilities.
2001: A Space Odyssey by Arthur C. Clarke: Two astronauts find their journey into space and their very lives jeopardized by the jealousy of an extraordinary computer named HAL.
Starship Troopers by Robert A. Heinlein: In one his most controversial novels, a recruit of the future goes through the toughest boot camp in the universe and into battle with the Terran Mobile Infantry against humankind's most frightening enemy.
Contact by Carl Sagan: A multinational team of astronauts ventures deep into outer space, where they come face to face with an advanced alien civilization.
The Left Hand of Darkness by Ursula K. Le Guin: While on a mission to the planet Gethen — a world whose inhabitants can change their gender — earthling Genly Ai is sent by leaders of the nation of Orgoreyn to a concentration camp. The exiled prime minister of the nation of Karhide tries to rescue him.