Tree of Codes: The making of a die-cut book

So here is a cool book... There is a short video on how they made it at the link below...

http://www.linkedin.com/news?actionBar=&articleID=476174765&ids=0Ndz8Se3wRdPgIdz0Ndj0UdjsQb3kSdPgTcjoTd2MPc3oVc30TdPgIcPoRcjcNdPsQ&aag=true&freq=weekly&trk=eml-tod-b-ttle-99