Basically what kwritten said. I also have to admit I personally didn't buy the explanation that much nor loved the third book in terms of writing, but it was worth it for the characters and the relationship of the otp. I was so happily surprised with that! I didn't expect such thing from a YA book (and it's sad that I say this based on experience) but it was awesome. Can't promise you you'll like it, but maybe it's worth a chance to see it for yourself? :)