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.