Many editions combine the "Lehrbuch" (textbook) and "Arbeitsbuch" (workbook) to ensure students practice what they learn immediately.
The book is divided into 20 clear lessons, making it easy to track progress. delfin lehrbuch pdf
Because Delfin is dense with information, it is better to study for 20 minutes every day than for three hours once a week. Conclusion Volume 1 for A1
The Goethe-Institut offers a service called , which is a digital library. Depending on your region, you may be able to borrow German learning materials digitally for free. Tips for Learning with Delfin Volume 2 for A2).
The material is split into two or three smaller volumes (e.g., Volume 1 for A1, Volume 2 for A2).