Yet another nice thing about Kindle is that when a friend mentions they're reading a great book you can have it in seconds. This happened to me last week and since then -- that's to a lot of time in airports -- I've read Stephenie Meyer's wonderful Twilight novels. I really enjoyed them. Equally good, although very different, is her other novel, The Host. She reminds of Elizabeth Moon at her best, with rich characters, consistent worlds, and remarkably human stories.
Yes, Twilight follows the federally mandated sequence for vampire novels
Book 1: Vampires
Book 2: Werewolves
Book 3: Vampires vs. werewolves
Book 4: Vampires vs. shadowy vampire "government"
but Meyer's disregard for many mythical conventions allows her to build the world her way, and the result is very good. Yes, it is a "young adult" novel, but that shouldn't stop you from enjoying it. I look forward to book 5!