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I wanted to be able to feel fabrics to get an idea about fabrics I was not familiar with. LOVE the actual fabric swatches in this book! That's what I got it for, but it also goes into how the fabrics are made, how they are used, pictures of fashions with the fabrics, and terminology. A completely useful encyclopedia of fabric.
I think this swatch book is better organized than the textile kit. It also uses greige swatches so as not to detract from the fabric characteristics. It does, however, lack detailed discussion/swatches of tech fabrics.