Calculus for the Forgetful is one of the shortest calculus books available: it can be read in a couple of days if needed. Yet it provides a concise treatment of single variable calculus, along with many exercises and more than 130 examples. Informal, intuitive language is used to present the theory in a nutshell. Some topics are omitted for the sake of brevity, and the book is focused on the core ideas, with just a few digressions here and there. Calculus for the Forgetful is an ideal complement to any of the comprehensive calculus texts. It can be used by students currently taking a calculus course, as well as by those who would like to review and organize their knowledge. Those who plan to take more advanced mathematics courses or are preparing for standardized tests will also benefit from it. The book is small enough to be carried around to other classes in which calculus is used.