I've always got a book on me. I tend to lean towards the "who done-its" type of genre. Harlan Coben is a favorite. I like Jonathon Kellerman and his wife Faye Kellerman. I recently discovered an author named Tananarive Due - her books aren't really in the same genre, but still has you turning the pages to figure out what happens next. The Living Blood is a good book to start with.
I also like werewolf/romance type books. I adore Donna Boyd's books, The Promise was one of my favorites. Also, Virginia Lanier has a series of Bloodhound books that are pretty awesome. I believe I read that she has died, so once you read her series, there are no more on the way.
My library has a section when you first come in where the librarians put up new releases and some of their favorites, and I usually just head there and get about 10 books, all sorts of different authors. None have disappointed so far.
I also don't even listen to the radio any longer, I head to the books on CD section, and I find the ones for Young Adults to be the best stories. I recently got hooked on the Pendragon series. My commute to work is about 30 minutes, and home is 45 minutes. And any time I'm on a road trip alone, I always make sure I have a couple of books on CD for the trip.
Oh, and the Kindle is going to be mine one day!!!!