In the preface of Introduction to calculus and Analysis I written by Richard Courant, the author said that
Numerous examples and problems are given at the end of various chapters. Some are challenging, some are even difficult; most of them supplement the material in the text. In an additional pamphlet more problems and exercises of a routine character will be collected, and moreover, answers or hints for the solutions will be given.
Have you seen this pamphlet? What's the name of this pamphlet or where can I get it?