Called "Illustrative Designs of 50 Intellectual Rope-Ring Toys", this book has detailed illustrations and solutions of 50 disentangelment puzzles. Text is in Chinese with some English but drawings are very clear.
Shows both old and new puzzle designs. You can make your own brainteasers and rope puzzles from the plans in this book.
This book is not even on Amazon. Book is new.Book is 140mm x 205mm in paper back. 230 pages including 8 pages with colour photos of puzzles.