[posed]

I second this strongly, you can’t get better at math just by reading books. You need to hone your problem solving skills, you need to fight with the problems, have the mindset of a warrior, a conqueror, only then you’ll get the juice out of it and have a clear understanding of the subject. I’ll suggest starting with Concrete Mathematics by Donald Knuth, it’s a beautiful book that catches the essence of mathematics.

Art of problem solving(https://www.amazon.in/Art-Problem-Solving-Basics/dp/09773045...) is also a great start, especially if you don’t have much experience.