Many learners buy the physical book and CD set, then scan the book themselves for personal use (legal in most jurisdictions for private study). The audio can be ripped to MP3.

Websites that promise a free download link for Assimil Perfectionnement Anglais are almost always:

Ethical concern:
Assimil is a smaller, family-owned publisher. Piracy directly hurts their ability to create new courses. If you appreciate their clear methodology, consider supporting them legally.

A: Yes! The Assimil app offers the first 7 lessons of many courses (including some advanced levels) for free. Test before buying.

A: €59–79 depending on sales. Compared to private tutors or group classes, it’s very affordable for 100+ lessons with audio.