I couldn't find a direct link to a free PDF version of Steve Quayle's book on giants. However, you may be able to find it through online archives, libraries, or purchase a digital copy from online retailers like Amazon or Google Books.
Genesis 6 Giants: Master Builders of Prehistoric and Ancient Civilizations. "
Steve Quayle’s books are self-published, copyrighted materials. Writing, researching, and publishing these heavy, image-filled volumes requires a massive financial and time investment. Downloading pirated PDF versions of his work deprives the author of the resources needed to continue his research. Official physical copies, e-books, and related audio/video materials are legally sold through his official websites. Cyber Security Risks