This book is mostly a problems repository. Like the author's other "humongous" books, from chapter 1 it starts giving you problems with very little setup or theory up-front. It does have a chapter introduction page that introduces the topic(s) in the chapter, but then it just starts in with example problems. But, unlike some of the other guides out there that have just a ton of example problems in them, the author does weave in the explanation of the theory in the form of margin notes that are added to explain how to tackle/solve the problems. Along with the theory, the author gives you tips for solving different problem types, advice on things to look out for, and marks the hardest kinds of problems with a skull and cross bones, which I think are good problems to go over before your exams.The book is good in that it does not just dive into the calculus material. The first 8 chapters (about 120 pages or so) are a review of algebra and trigonometry, making sure you have the fundamentals down in case you need to brush up on them, and then it gets into the calculus material. The calculus material covers all of the topics that you will be exposed to in the first year of calculus, starting with limits and ending with using integration techniques on sequences and series problems. It also goes over the introduction to differential equations that students usually get in the second semester, and has good examples for solving related rates problems and optimization problems.The book does not cover multivariable calculus, linear algebra, or the more complicated differential equations material that you will get in later classes if you need to go beyond calculus 1 and 2. This will, however, definitely help you get through the material in the first year of calculus, especially if you have a hard time understanding your textbook and/or your teacher.