Ha, that's what happened to me. I read the first three Harry Potter novels, then when going into the 4th one I just couldn't get into it and abandoned the series. I wonder what it could be that causes that. For me, anyway, I think it might've been because I was 50 or so pages in and they hadn't even gotten to Hogwarts yet. Or even the Quidditch game or whatever. The biggest cause, though, might've actually been that, well, I forgot to bring it with me on a trip to Philly. I was going to bring it with me to read on the ride, but forgot, and once I got back I just didn't feel like picking it up again for whatever reason. I actually read The Goblet of Fire first before going back to book 1 and reading the rest of the series in chronological order. And that, kids, is why you should never stay up late and watch parts of movies based on books before you read them.