I finally grasp what this whole double-knitting thing is about: thick, reversible fabric with inverted colors on the inside.
The author starts with a basic review and clear instructions on how to do double-knitting. The beginning has some useful practice patterns including coasters or pot holders (and a cat pattern).
Then there is a collection of more complex patterns. My favorite pattern is on the cover of the book (Crop Circles), because some of the other patterns look a tad old-fashioned to me, or a bit busy. The garments produced from this technique are only for winter--since are basically double-thickness. I don't know if I'd wind up wearing them much in my moderate climate, although you never know. The Mary, Mary Quite Contrary shawl is very pretty.