Contact

Do you have any questions or do you need help?

Our customer support will be happy to help you!

Monday – Friday
10:00 – 13:00 and 14:00 – 17:00 (Friday until 16:00)

Phone: +49 89 550559-0

E-mail: info@grin.com

Simply give us a call or write to us: We are happy to assist you personally.

Have a look at our FAQ

On our FAQ page, you will find information about buying e-books and books at Hausarbeiten.