This book is amazing. But I'd suggest everybody to read the version edited by Martin Gardner in 1998[1]. The first version written by Thompson ignored the use of limit, and it also used terms that aren't used anymore. For example, the older book used the term 'differential coefficient' which is now known as derivatives[2].

[1] https://www.amazon.com/Calculus-Made-Easy-Silvanus-Thompson/...

[2] More about the difference between old and the new book https://en.wikipedia.org/wiki/Calculus_Made_Easy

In a PDF on Project Gutenberg: Calculus Made Easy by Silvanus P. Thompson

http://www.gutenberg.org/ebooks/33283

Seconded. I did calculus decades before I became aware of this book, but in reading it now I think it's excellent, and very much wish I'd known it before.

By contrast, I didn't find the submitted book very engaging, but I'm sure it's a matter of taste, and others will disagree.