Although the second volume is not free, Bradford Werner provides extensive free supplementary materials to accompany it:
While is offered as a free PDF by Bradford Werner, Classical Guitar Method Volume 2 Pdf Werner Free
The search for is a search for a ghost. The legally free version does not exist because the author intentionally made Volume 1 free and Volume 2 paid. The copies you find will be unauthorized, likely poor quality, and harm the very educator who gave you Volume 1. Although the second volume is not free, Bradford