I'm currently a huge fan of Stieg Larsson! His writing is spectacular, the style keeps you going for hours! It's a shame he was only able to put out the three books that he did. I'm a portion through the Girl who Played with Fire, and I'm still very impressed, as I was since page 1 of the first book.
Jody Picoult is also an author I love, due to her addicting use of words. She gives everyone something to connect to, and the way she proposes certain topics and ideas makes you think twice. Her books are great to discuss and experience, so if you have the time, give her writing a shot!