The philosophy behind the book is evident in its title. Unlike older, grammar-heavy textbooks that focused on abstract rules, Menschen focuses on interpersonal interaction. It teaches you how to navigate daily life as a person living in a German-speaking environment.
If you specifically need a digital version, here are your legal (and often affordable) options: hueber menschen a1.1 pdf
If €12 is truly impossible, skip Menschen entirely. Use – it is completely free, government-funded, and includes downloadable PDFs of every lesson script, plus a vocabulary PDF. You don't need a single illegal file. The philosophy behind the book is evident in its title
If you live in Germany or Austria, your local library offers (online borrowing). You can borrow the "Menschen A1.1 PDF" for 14–21 days for free. All you need is a library card (€10–20/year). If you specifically need a digital version, here