As makers, we tend to learn different stitches over time without thinking much about how they relate to one another. But when Natalie Chanin and her Alabama Chanin and The School of Making teams began to look at needlework closely, they realized all stitches are based on geometric grid systems--and by using grids as guides, they could make learning stitches, even seemingly elaborate ones, as easy as child's play. In The Geometry of Hand-Sewing Chanin...