For those of you with a taste for both Sci-Fi and Fantasy, I suggest Artemis Fowl by Eoin Colfer. It is the first in an eight-book series, and it's one of my favorites. It is Middle Grade to Young Adult genre wise, but many adults will enjoy it as well.

The book follows a twelve-year-old boy genius named Artemis Fowl II.  When his father disappears into the Arctic after accidentally blowing the family fortune, Artemis wants to launch a search party to locate his father. But for that he needs money, money he no longer has.
Artemis soon discovers the existence of fairies living underneath the Earth's surface, and that each fairy has a ransom fund of gold. When Artemis succeeds in capturing one of these fairies, he's about to get much more than he bargained for.
Captain Holly Short is a leprechaun. Actually, she's a Lower Elements Police (LEP) Recon officer, and the first female one to boot. When she's captured by a human, the LEP will do whatever it takes to get her back.

As one of my favorite books, Artemis Fowl is full of wit, magic, action, and technology. It is also available in audio, and the narrator, Nathaniel Parker, does a very good job.