If you haven't seen the Courtney Davis celtic tshirts you may not know who she is. If you have, you probably own several, and already know to get this book. You may even have some and not realize it, many examples of her work are sold at Celtic fairs. The designs in the book are clear and good, can be used (with a little work with scizzors, transfer pencils and plastic sheets) for either stencil, embroidery, a background for the paint-on stained glass decals, or scanned in for any purpose you would like. It's definitely a book to buy if you are building your celtic crafts collection.
the first 30 of 45 pages are given to borders and surfaces, most of which are rather trivial, and most of which are quadrangular, so it is difficult to have them on anything non-quadrangular. some at least can be expanded ad infinitum, but at least half can't. the rest of the book is given to designs of varying quality, zoomorphic and otherwise, some of which at least are not the standard square/circle, but irregular. the book is not a must-have, the best patterns are shown on the cover, but it is worth the price.