Viburnums are widely acknowledged as some of the most useful garden plants, yet to this point coverage of this group in the horticultural literature has been sparse. As such, this book fills a huge void. And coming from one of the world's most respected woody plant gurus, this tome is most appreciated. Its greatest strength is encyclopedic treatment of the garden worthy species supplemented by quality photographs. While some text appears to be lifted from Dirr's other books, the insight offered by the author is invaluable. Anyone gardening in temperate regions can benefit from including this book in their library.