I completely geeked out on all 6 books so far, but I giggled like a little girl at the reference in chapter 20 at the very end. I was pretty surprised and had to play it for my significant other who isn’t listening to any of the books at all. I’ve also really enjoyed the narrator through all the books, and his voices for the characters.
I will say some of the “information requested” parts are hard to follow in relation to the main story, and it makes my mind stutter when it jumps back into the plot after one of those.