I have been struggling with this book for a number of reasons.
I loved the idea of the pick'n'mix "recipes" aspect of creating my own sock combination, especially as the spiral binding and elastic page-holder seemed ideal for the job. However, lay the book flat - and the pages simply slip out from under the elastic, because it is positioned too close to the edge of the book.
My solution - mark the combination of designs with 3 different coloured post-its, which will stick out far enough for the elastic to trap them properly. Then mark the pages with the relevant instructions with matching coloured post-its. Not pretty, but it works, and makes hunting around for the instructions much easier.
Editing is also poor. One example is the incorrect labelling of some of the socks in the gallery at the back. This should really have been spotted and rectified before print.
Another more important mistake is on the origami heel pattern, formed from short rows. How can you work on a basic heel of 32 stitches, decreasing one stitch at the end of each short row - and still end up with 32 stitches? Clearly there are some instructions missing, presumably for a wrapped stitch or one picked up along the way.
And I wholeheartedly agree with the reviewer who commented on the choice of yarn used to illustrate all the sock patterns. Despite the gallery at the back, which clearly shows a number of socks knitted up with most, if not all, possible combinations, the same dark red and black-flecked yarn has been used throughout the instructions themselves. Any sock designer or knitter with a modicum of experience will know that bright, block colours work best for stitch definition when you're trying to show off lace, cable, well any kind of stitch pattern, but especially in print.
Truly disappointed; I suggest that the patterns are read and corrected before anyone tries to knit them.