Security is another point. Unsecured PDF downloads can lead to viruses or phishing. It's important to warn users about that. Also, the legality—download rights for educational purposes, fair use vs. copyright infringement.
I should avoid recommending sites that host pirated content. Instead, guide the user towards official sources. Also, check if the book is available in a digital format through legal means, like Kindle or similar services.
Another angle is the educational aspect. The review should highlight the content of the book itself—what makes it effective for A2 learners. Maybe it includes exercises, grammar explanations, cultural notes. But I need to do a bit of research to confirm typical contents of A2 Italian courses.
Additionally, the quality of the PDF matters. If someone downloads a pirated version, it might have poor formatting, missing pages, or be a scanned version of a printed book, which isn't ideal for digital study. On the other hand, legal PDFs might have better formatting, interactive features, or proper licensing.