There are many great books that can help you learn calculus, but the best book for you will depend on your level of mathematical knowledge and your learning style. Here are a few options that are widely recommended:
"Calculus" by Michael Spivak - This book is often considered the gold standard for learning calculus at a deep level. It's rigorous and challenging, but it's also very thorough and provides plenty of examples and exercises.
"Calculus: Early Transcendentals" by James Stewart - This is a widely-used textbook that covers both single-variable and multivariable calculus. It's known for its clear explanations and numerous examples and exercises.
"Calculus Made Easy" by Silvanus P. Thompson - This classic book has been helping people learn calculus for over a century. It's written in a conversational style and focuses on the concepts behind calculus rather than the formalism.
"The Calculus Lifesaver" by Adrian Banner - This book is designed for students who are struggling with calculus or who need a refresher. It covers both single-variable and multivariable calculus and includes plenty of examples and explanations.
Ultimately, the best book for you will depend on your goals and preferences. Consider looking at reviews and sample chapters before making a decision. It may also be helpful to talk to your math teacher or a tutor for recommendations.