While waiting to obtain the legitimate PDF, consider these free or open-access resources:
If you are a trainee or a student in a metalworking trade: – it’s the single most cost-effective investment for your entire apprenticeship. Many exam questions from the IHK (Chamber of Industry and Commerce) are directly based on this book.
If you’re an instructor: Contact Europa-Lehrmittel directly for examination copies or school licenses – they are usually cooperative.