This exercise book on German grammar offers numerous exercises for both beginners and advanced learners covering all relevant chapters of German grammar. It includes fill-in-the-blank, substitution, and transformation exercises, as well as exercises on sentence structure. The final chapter invites readers to identify errors. Vocabulary and expressions are drawn from everyday German language. Exercises with a higher difficulty level are marked with one or two stars. Although this exercise book is designed for German learners, it can also be useful for native German speakers who wish to review their grammar knowledge. The solutions to all exercises are located in the appendix.