Nothing about pruning is obvious; in fact, most of it is downright counterintuitive, says expert Cass Turnbull. This second edition of her definitive illustrated guide adds 40 percent new material, with more coverage of different kinds of trees, shrubs, and ground covers and how to prune them for health and aesthetics. The book is organized around the most common types of plants found in Northwest gardens: evergreen and deciduous shrubs; bamboos and tea roses; rhododendrons, camellia and other tree-like shrubs; hedge plants like boxwood and heather; clematis, wisteria and all those vines; and detailed information on trees by species from dogwoods to weeping cherries. In her trademark witty style, Turnbull also addresses tools, landscape renovation, and design errors. Included too are her amusing Ten Commandments for gardeners, which feature such treasures as "Thou shalt not weed-whip the trunk of thy tree, nor bash it with thine mower, nor leave anything tied on thy tree or the branches of thy tree, as is done in the land of the philistines."