Knit Knacks, by Pat Trexler

This is a book of practical tips for knitters of every skill level. Trexler for many years wrote a syndicated newspaper knitting column called "Pat's Pointers." As an example, included in the book is a chart showing yarns that are interchangeable, i.e., yarns from different distributors that can be substituted for ones called for in a knitting pattern book (which in general means that a swatch knitted with one, using the same size needles, is the same size as a swatch knit with another).