I’m a few chapters away from the end and can already say without doubt that this book is a lifesaver. I’m currently doing a course in quantitative finance and found myself falling behind on calculus really quickly. Upon reflection I admitted to myself that I didn’t even know the basics. Well, after ploughing through every exercise and example as far as the chapter on definite integrals, I no longer have anxiety looking at introductory-level calculus problems. The rules are clearly explained, and each exercise has a detailed answer which leaves no doubts as to how it was achieved. Ok, back to completing the last few chapters!