1. His Dark Materials, Philip Pullman
2. The Giver Quartet, Lois Lowry
3. The Sandman, Neil Gaiman
4. The Abhorsen Trilogy, Garth Nix
Why you should read it: Set in a dual world of two kingdoms, one magical and one not, Garth Nix's trilogy follows the exploits of the titular Abhorsen. The Abhorsen is an anti-necromancer, who must banish the growing threat of the undead from the land. The stories are highly inventive and super engrossing. Although written for young adults, the story is still entertaining enough that adults may like it too, despite its simple style.
Recommended if you like: The Hunger Game's strong female lead.
5. Do Androids Dream of Electric Sheep, Philip K. Dick
6. The Diamond Age, Neil Stephenson
7. The Hitchhikers Guide to the Galaxy Trilogy, Douglas Adams
8. The Discworld Series, Terry Pratchett
Why you should read it: Set in a fantasy world that takes place on a giant disk, balanced on top of four elephants riding atop a turtle through space, this series is unique. At over 20 books, each story can function as a standalone with unique characters. The series is also amazingly intelligent, varying from murder mysteries to political intrigue to pure fantasy. Pratchett imbues the entire series with satirical British wit, along with sharp criticism of the contemporary world
Recommended if you like: Anything produced by Monty Python, satire, and quirky facts-of-life humor.