If you like Sci-Fi, here's some books that I really liked:
The whole Ender's Game series by Orson Scott Card. As a bonus the movie for the first book is coming out soon! The first book is fairly short (I think I read it in 2 days) and I found it very entertaining/interesting, and then the serie kinda split in 2, half of it being more in the ethic/xeno range (very good imo) and the other half is more futuristic politics/wars (good and entertaining, but not as 'deep').
The 4 books series of Hyperion by Dan Simmons is my all-time favorite book series, and I read a lot. It's a really good sci-fi series, incredibly well thought-out. Makes me think a little bit of the Matrix in term of stories, although much more subtle (it's not a dream world or anything). The first novel is a big 'wtf' and you don't really see where he's gong with this, but it,s worth reading in full. His books Illium and Olympos are also very good, but quite weird.
All the old Isaac Asimov stuff is actually very good, especially imo the original Foundation trilogy. The Robots stuff is good too (the book I, Robot has absolutely NOTHING to do with the movie...)
If you want some more classic novels that are not sci-fi, the Count of Monte-Cristo by Alexandre Dumas is an awesome book (and really had quite an impact, it's referred to in countless other movies/books). Les Rois Maudits (there must be an English translation, don't know it) is a more historical novel series (really is historical, it's not fictional characters) that is very interesting, very well-written and will actually teach you some actual history at the same time!
There's plenty more, but I think that these books are all very much worth reading and accessible for someone who's not necessarily used to spend hours reading. Maybe the Hyperion stuff requires a bit more 'work' to get through, but it's also imo the best of the bunch.