Thats exactly it, thank you so much!

Children’s book, isolated world that exists on a 3 tiered mountain and is totally self sufficient and the fig somehow is the staple crop. Young adult gets curious and explores and finds the dystopian truth. The unique bit was the architect of the mountain paradise thing had such a large intellect he used strings of 6 numbers to recall memories like a biological card catalog. There was also a website where you could plug in the numbers from the book to pull up like blueprints and pictures. I wanna say it starts with “Ae-” but I havent been able to find it since I read it in '08

I’d bring a 4 year old that I’ve just filled with carnival food to their home office. I want to see how this person reacts to a child throwing up on and possibly breaking their things. I wanna see how they as an adult handles a situation that is no one’s fault but needs handling