Holding onto the mysterious book, Zhang Tie skimmed through the book of about 200 pages, unable to sleep. The paper was both water resistant and fire resistant and was coated in silver. Zhang Tie knew that silver coated paper was extremely expensive. Only a few very important classical or sacred books would be recorded on silver coated paper. However, as silver coated papers could not be printed, people had to use a special pen and ink in order to leave marks on the paper, thus all books or texts made using silver coated paper, including the book containing the <Iron-Blood Fist> skill, would have to be copied by hand. Even the patterns inside the book were painted by hand. Obviously, the book was copied and written by the hand of a highly skilled man, as the words and pattern inside the book would make people feel happy and looked more appealing than even printed books.