ANN RALPH 168 PAGES 7â x 9â Soft Cover With Ann Ralphâs radical, yet simple pruning technique and easy maintenance plan, any full size variety of fruit tree can be kept small while still producing full-sized fruit in abundance. The author is a fruit tree specialist with 20 years of nursery experience, who has taught pruning classes for many years. Of course, if you live in the short season of the north, tree size is not your main concern. However, most of you in zone 5, especially in protected urban settings, may well find this book to be your best $20 investment. Follow Annâs clear and easy instructions, from the minute you plant your trees to keep them compact, manageable and productive.