Memorization

If you have seen any of my posts in the past you will know how obsessed I am/have been with TLA and Joseph Delaney's other series, so I will not beat a dead horse, but that can serve as context for this post!

I've never been the best with memorization of details or titles of fictional series, no matter how much I enjoy them, however TLA is the one exception! I cannot think of a single detail I have had to go back and search for, or piece of lore that I have forgotten in recent years, and I know the name of every book off the top of my head, which I can say about no other long series. I say this not to brag but as a matter of fact and as context for the questions this is leading too, (especially seeing that this obsession feels as though it goes a bit beyond what is healthy).

My questions are this:

1. While I do have the order of the books memorized, for some reason, books 8-12 always trip me up and I have to sit and think about them if I want to recite the list. Does anyone experience this as well, have any idea as to why, and/or have any ideas on how to combat this.

2. I have looked tirelessly for trivia, quizzes, or anything of the like about this series and I have yet to find anything. I would like to test myself and my knowledge about the TLA universe but I simply can't find anything! Does anyone know where I can find something like that?