For context I’m soon to be a college freshman at UChicago. I never have really done competition math since I did other things in high school but I have taken Calculus 3 and linear algebra.

If I were to try my best at the Putnam what do I need to do?

Which of these books are the best to start off with?

Putnam and Beyond

Art and craft of problem solving

How to solve it

How to prove it

Any input would help!!!