This is a nicely produced reference book authored by an Englishwoman who has been much honored by the Royal Horticultural Society of Great Britain. The book is beautifully illustrated with numerous color photographs and the descriptions of the small trees and shrubs are concise and informative. However, if you are looking for a practical resource for the more northerly temperature zones of the US (Zones 4 or less), the book is of somewhat limited value. For example, of the 400 plants described, only a very few are hardy in Zone 4.