This is a great book to add to anyone’s Calculus collection library.<br>Alert-<br>The writer assumes that you are proficient with Algebra and the formulas, postulates, and theorems that accompany, as does all other Calculus books. If you have not completed Algebra and a good understanding of Trigonometry then don’t buy this or any other Calculus book. Calculus is not a math toy to play with, without the basic foundation to start from.