One Mathematical Cat, Please! Understanding Calculus
Curious about Calculus? Want honest content, but a bit ‘slower and kinder’ than traditional Calculus books?
Like the way I explain things in Algebra I, Geometry, Algebra II, and Precalculus? Then, this book is for you.
It's a complete Calculus course. You can read it online or buy a printed version.
I call it the ‘warrior cat’ book because of the printversion cover. (You can read about these four cats in my Mathematical Cat Gallery: numbers 23, 24, 25 and 26.)
Read the ‘Warrior Cat’ Book For Free Online
The entire book is available below. Or, you can get a Complete Calculus Course bundle at my Teachers Pay Teachers Store that includes pdfs of the complete book, solution manual, Calculus index cards, prerequisites, and endofyear review.
Gone through my online curriculum through Precalculus? Then, jump right into Chapter 3.
Haven't been using my lessons? No problem. The first two chapters review essential material and introduce you to all the math language concepts you'll need.
Print Version of the ‘Warrior Cat’ Book (and Complete Solution Manual)
Understanding Calculus
(the main text)
The PRINT version of the Warrior Cat book is for those of us who like to highlight, write in margins, feel the paper between our fingers.
Both the online and print versions include selected solutions: oddnumbered endofsection exercises and Quick Quiz Problems.
For ALL the solutions, I also offer a Complete Solution Manual. It includes completelywrittenout solutions to:
 All the insection exercises
 All the endofsection exercises
 All the sample tests
(A pdf version of the Complete Solution Manual is included in my Complete Calculus Course bundle at my Teachers Pay Teachers store.)
Calculus Index Cards
I also offer a set of Calculus Index Cards. Hold the entire course in the palm of your hand!
(These index cards are included in my Complete Calculus Course bundle at my Teachers Pay Teachers store.)
Classic Calculus Textbooks
These are the Calculus textbooks I learned and/or taught from in my early days (before using my own materials). You can see the wellworn bindings. I even put tabs on Stewart to help me quickly turn to various sections.
Of course, you can't (easily, at least) get the ones that I have anymore. I can't comment directly on any of the current editions (below), but all the ones I have are excellent. If you want a more traditional text, likely any of these would be a great choice.

Calculus: One and
Several Variables
My fourth edition by Salas and Hille has evolved into this tenth edition with added author Etgen. 
Calculus
My fourth edition by Stewart has evolved into this ninth edition with added authors Clegg and Watson. 
Calculus and Analytic Geometry
My first edition by Stein has evolved into this fifth edition with added author Barcellos.
READ THE ‘WARRIOR CAT’ BOOK: UNDERSTANDING CALCULUS
The materials in green give unlimited online practice and/or supplement the text.