First of all I loved this innovative book, I was looking to get completely away from the usual patterns I find which I suspect have not changed since the beginning of the last century, very clever but so completely boring, and this book gave me permission. However, I then found it impossible to follow because the yarns are unknown in U.K. and twice our 4ply could not possibly give a chunky 8ply, and no tension measurements are given for the 8ply, and others mentioned.
I made a complete hash and wasted so much time with my own experiments with local yarn, (however they would certainly made you laugh)and would have liked to work at least one of the cozies that would look good as well as useful on my teapot from the book first. I cannot even find 8-ply yarn on the internet.
I feel this book being sent out to the world should have mentioned suppliers for these unusual yarns. Most craft books I have do give a list of these.