Knitting:
The designs in the book are fairisle designs using only two colours in the row with colour changes all at the same side. Alongside the main design grids there is a set of smaller mirror image charts which you can follow on the purl rows if you prefer so that you are always reading from right to left in the same way you would knit from right to left. (If you are a left-handed knitter, of course you would follow the mirror image chart on the knit rows and the main chart on the purl rows)