The contents of the books are identical except for differences in U.S. and U.K. word spellings. The U.S. version is softcover and the U.K. version is hardcover.
The following quote is from the inside flap of the U.K. edition:
This book "is an excellent introduction to this beautiful and fascinating art. With chapters on the origins of the subject, together with instructions on basic techniques and equipment needs, the book moves on
to cover easy, intermediate, and advanced step-by-step projects, designed to help you practice and master a range of techniques and subjects in an easy-to-follow way.
Final chapters show how to finish and display your work, and provide a gallery of artists' work to delight and inspire you. For the complete novice, as well as more experienced painters, this book will bring pleasure and inspiration to budding artists everywhere."
(from Sumi-e - A Beginner's Art Guide, Silverdale Press, 2002.)