The Percy Jackson Series by Rick Riordan
-All five books in the series are out now (although, I will admit I'm still on book four!) But this is a series to know, especially with the movie coming out in February. One of my co-workers just discovered this series and we're planning a program for December. I would suggest it for fans of Harry Potter (it has a lot of the same elements, but I felt it stood on its own instead of reading too much like a HP copycat). There's also a ton of humor and it's a great way to learn about Greek mythology! The series also has great cross-over appeal for teens and adults.
-Before we had The Hunger Games, Suzanne Collins gave us Gregor. This is another one that I haven't finished the series completely, but what I've read I've loved. (FYI-the books do get darker as the series goes on, as there is a war being raged) The premise behind the series is it's an "urban Alice in Wonderland."
Skulduggery Pleasant Series by Derek Landy
-This is a recent discovery of mine. I was told to listen to the audibook forever ago and I finally did. It's not often that my husband agree on audiobooks to listen to on road trips, but this is one we both enjoyed. Skulduggery is a wise-cracking skeleton detective who meets up with Stephanie. There's mystery, magic, and lots of humor! Plus, the narrator is wonderful and really brings Skulduggery to life. This is another one that I think has great teen and adult appeal as well.