I just finished the 3rd.
On Monday when I was at the community pool, I saw a girl also reading the 3rd, and it took everything I had to not walk over and start chatting with her about it.
If everyone had the chance to read these books, I think we could finally have peace in our world, because everyone would love them so much. When peace talks in Bern, or Geneva, or whatever, weren't going so well, someone could say, "which is your favorite task in the 4th book?", and everyone would chime in, and then, after a while, they would get back to peace business.