Richard Courant and John: Introduction to calculus and analysis

Calculus can be considered as a set of methodologies developed over a period of time to solve various mathematical problems especially in the field of physics but not limited to it. Newton and Leibniz are considered to be pioneers in that . This book covers basic to advanced topics in that field. The author explained limits, differentiation, integration, its applications, Taylor/power series, numerical analysis and Fourier/trignometric series. This book will be useful for those who are working in/pursuing that field.

Calculus Made Easy - Silvanus P. Thompson

I was looking for a book on calculus which gives solid foundation on the subject, from which I can relate to the real world. I got to know about this book on Google searching. I recommend this book to the students of calculus to get better understanding of the subject.
The author demystifies most of the notations used in the  subject and makes this stream of mathematics more accessible for an average person.
Book deals with basic differentiation, integration and its applications.