Not a book. But I'd recommend this website :- https://www.mathsisfun.com/ https://www.mathsisfun.com/ website. Everything is broken down into to smaller chunks.

Not a book. But I'd recommend this website :- https://www.mathsisfun.com/ https://www.mathsisfun.com/ website. Everything is broken down into to smaller chunks. I stumble upon it when I was looking to revise my algebra concepts. But now I'm learning physics on it.