Kate Atherley, Ontario, Canada, kateatherley.com.
Custom Socks: Knit to Fit Your Feet (F&W, 2015) is an invaluable resource for knitters, crocheters, and sock makers in general. While the information is knit focused (and some only applies to knitting) the information on sizing, measurement, and yarn is information every maker should have. --Rohn Strong Designs