Alex Shigo spent a major part of his career with the US Forest Service studying wounds of trees and how they affected their biology. He transferred his findings verbally and visually in brilliantly colored drawings that were originally published in a series of classic USDA bulletins and later in a series of excellent books such as this one for all of to see and understand. The suggestions in this book are based on his career discoveries about how trees compartmentalize wounds and continue to grow. They constitute fundamental practices to be employed by anyone that owns and/or cares for trees of any kind, especially those that bear fruit, are valued for prime timber, or prized as specimens in public places and residences. This is very likely the best reference available for growing and maintaining trees that will reflect perfection throughout their lives.