Again, could be a five, and it just may be where I'm at in life at the mo, or something.
These are really good books. And I plan to get the physical copies for my book shelves so my sons can pick them up and read them when they're a bit older.
Enjoy the characters and overall story. There's just something standing between me and an "Oh my god, I LOVE these books!"... As mentioned on previous books in the series' I think it's the style of 1st person narrative chosen. This is purely a personal opinion/response. I'm sure others take no issue.