I should also think about the audience. Are they self-learners, students in a class, or perhaps someone preparing for exams that require B2 level? Different audiences might have different needs. For example, someone preparing for a test might need extra practice materials or past papers.

I also need to address the legal aspect. Downloading the entire PDF for free when it's copyrighted would be piracy. So I should discourage that and instead suggest where to get it legally, maybe through the publisher's website or online marketplaces like Amazon or other book retailers.

I should also include tips for using the textbook effectively, even if someone has access to the PDF. For example, practicing speaking and listening, using flashcards for vocabulary, doing all the exercises, etc.