almost all John Grisham's book are brilliant..

The Client is really good, even much better than the movie.
The Testament is brilliant and funny, you guys should read this! it's about a filthy rich old guy who jumps out of the window and left his whole estate worth billions to a daughter he had never known who lives as a missionary deep in a jungle in South Africa, and read about his three ex-wives and money-hungry sons and daughters trying to contest his will at court.

Others are Runaway Jury, The Pelican Brief (a bit dark but it's okay), The Firm, The Rainmaker, A Time To Kill ( an amazing story about a father who avenged his daughter rapists and got convicted for it) and The Street Lawyer
The Partner is a story about a guy who ran away and stole a bunch of money from his old lawyer firm and got caught but there are more twist and turns than you could possibly imagine.

well i know it's a bit boring for you who doesn't have much taste in law or courtroom dramas, but i'm no lawyer but i love most of his books.
the language is easy to understand and believe me, i'm not that good in english, but i can understand the story perfectly.
i'd recommend these for ages 13 and up.

i also read Michael Crichton's work, such as Jurassic Park and The Lost World (obviously after i saw the movie).
well i admit unless you have this really expansive vocabulary, and knowledge about lots of science terminalogy, you have to keep a dictionary handy to read his works.
Timeline is quite good, if you could ignore all the complicated technical stuff.
but the most of all i love Airframe because the hero is a woman
maybe 13 and up.

Alice Hoffman's Practical Magic is simply.. magical..
you'll love it, the way this woman writes, simply astounding, much much much better than the movie.

hrm.. what else eh?
ok Harry Potter books of course!