Named Essential Calculus for a reason, this book presents the basics of calculus in an easy to understand way. It exposes the careful reader to an overview of calculus with enough depth to provide an appreciation of the power of calculus and the ability to solve real world problems Included are several Motivational Problems which illustrate the scope of calculus. Learning calculus presents the student with several "AHA " moments. This book will share several such insights with its readers.