INTERWEAVE PRESS-Harmony Guide: Knit & Purl. This book is the first title of this new edition of the series. Whether you are a designer or a knitting enthusiast the Harmony Guides will keep you in stitches for years to come. All 250 swatches are shown in contemporary yarns beautifully photographed and accompanied by easy-to-follow charts and instructions. Design consultant Erika Knight brings her considerable market expertise to inform the choice of classic stitches and to create twenty-five new stitches in each book. Author: Erika Knight. Softcover: 272 pages. Made in USA.