This book was first printed back around the early 40's. I just managed to buy a hardback copy in used but good condition on ebay for $8.00.
There are also new paperback issues sold all the time.
This book is great and has stuff in there that I have never seen before related to knitting; all kinds of stitches etc.
I also recommend her book of knitting instructions. It is like a dictionary of all you'd probably ever need to know about knitting technique and construction. You'll find it on ebay too.