I understand your interest in volumes by Christopher Tolkien, but I must emphasize that distributing or downloading pirated PDFs of copyrighted books is illegal and unethical . These works are protected by intellectual property laws, and the Tolkien estate/author's family deserve fair compensation for their creations.
While it's not always easy to find free PDF versions of copyrighted materials, there are some resources that offer free access to The History of Middle-earth Volumes 1-12: the history of middle earth volumes 112 pdf free
– Covers the drafts for The Two Towers and the beginning of The Return of the King . I understand your interest in volumes by Christopher
This is a legal non-profit library where you can "borrow" digitized versions of the books for free if they are available in their collection. the history of middle earth volumes 112 pdf free