Not too long ago I got the idea for a series of paintings with a celtic-medieval themed look. This book was one of the two books on celtic designs I bought. The type of patterns shown are very diverse and range from simple borders, to spirals, zoomorphs (animal-designs), calligraphy to examination of designs from Lindisfarne and the Book of Kells. It is also the most extensive of any of the books on this subject that I've seen. The only drawback is that the method for constructing these designs is not easy. As one earlier reviewer stated, the main method is to set up a grid pattern, draw out every line then erase the ones not needed. There are other books with simpler, better step-by-step details for constructing celtic designs. However, no other single book covers such a wide range as this one. It also covers a lot of complex designs and shows how to recreate them that no other celtic pattern books demonstrate. Quite a lot of the history of these designs is covered too. For anyone who can only afford one book on this subject this one will be all they'll ever need.