I am not typically a science-fiction reader, but a neighbor recommended this book to me and I had to give it a shot. I started with Twilight and read all three in the series within a week. I literally couldn't put these books down, I was staying up all night just to read "one more chapter" and find out what was going to happen with Bella, Edward and Jacob.
The books are great, no matter who you are. I'm 31, a stay at home mom, and I thoroughly enjoy Stephenie Meyer's books - who cares if they are meant for teens? They're great for people of all ages.