Pop Sugar Reading Challenge 2019 a book revolving around a puzzle or a game.
Some of these are fun, some are just too much math. Whole numbers, people, don't use fractions, or make math that you need a calculator for when people are just trying to have fun. Some are just ridiculously out there in that you would never think of that, or there's actually another solution the author didn't think of (OK, that only happened once but I maintain I was also right).