"How to Ace Calculus: The Streetwise Guide" by Colin Adams, Joel Hass, and Abigail Thompson. This book is designed to help you (re)learn the key concepts and techniques of calculus, which is the study of change and motion in the physical world. It includes lots of examples, exercises, and practical tips to help you master the material.

"The Joy of X: A Guided Tour of Math, from One to Infinity" by Steven Strogatz. This book is a friendly and accessible introduction to math, covering a wide range of topics from basic arithmetic to advanced calculus and beyond. It is written in a conversational style and includes lots of examples and illustrations to help make the material more engaging and easy to understand.

"Algebra for Everyone: In-Depth Coverage, Examples, and Exercises" by James Brennan. This book is a comprehensive guide to algebra, which is the study of equations and formulas. It covers all the key concepts and techniques, including linear equations, quadratic equations, polynomials, and factoring, as well as more advanced topics like algebraic fractions and equations.

Overall, the best book for you will depend on your specific goals and interests. If you want to focus on a specific area of math like calculus, a book like "How to Ace Calculus" could be a good choice. If you want a more general introduction to math, a book like "The Joy of X" or "Algebra for Everyone" might be more suitable.

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My personal recommendation: All the Mathematics You Missed: But Need to Know for Graduate School