You should read the other kingsmaker until 37.5. That's like an epilogue to give you an idea of the storyline and setting. After reading up until 37.5 you can start this one at ch1
"King's Maker" is the first season, when they are kids. When they become adults you can start reading Triple Crown which is the mature version of King's Maker
I really want to read this but I don't understand what should I read first... This one or the other Kings maker? Can anyone help? Plzzzz