The "Fighting Poses" book is often a physical hardcover on Amazon. However, the is usually sold directly via the Masters of Anatomy Gumroad store or their official website. Prices range from $25 to $45. Considering you are getting 2,000+ high-res images and anatomical studies, this is cheaper than hiring a single life model for one hour.
For pure anatomical accuracy in fighting poses, the Masters of Anatomy PDF beats CGI apps because real human bodies have asymmetrical fat deposits and organic skin tension that algorithms cannot replicate. Fighting Poses Masters Of Anatomy Pdf