My absolute favorite charm square book is 'More Nickle Quilts' by Pat Speth. I have other books but they use 6 1/2 inch charm squares or 4 inch. This book is for 5 inch charm squares and you can use any type of fabric you choose, each and every pattern is just beautiful. I believe she has an earlier book called 'Nickle Quilts' with Charlene Thode.