The Knitter's Companion by Vicki Square. If you have completed a sweater only to find the buttonholes gape, ribbings flare, or seams pucker, or if you want to learn a variety of ways to cast on, shape, or seam a garment, this book is for you. It offers clear illustrated directions for dozens of knitting techniques, as well as tables of body measurements, yarn requirements, formulas, conversions and more.