A unique book that allows you to take the 8 basic hat styles and make them on any loom you want. This means the book includes basic math formulas based on peg numbers of a loom to calculate out number of rows and pegs for each pattern. This is also a wonderful book for beginning designers and also for beginners. There are written examples in the book using a 36, 42, and 48 peg Knifty Knitter replacement looms by CinDwood Looms. The book also includes video tutorials that will help you understand the formula and how you use it to make the hats in this book. The book that will give you freedom, so have fun, and good luck!!!!