Book Synopsis The new edition of this textbook provides an overview of design principles and techniques for using plants aesthetically and functionally in landscaping. Unique to this book are discussions on using a microcomputer for selecting plants, preparing cost estimates and writing specifications. More than 200 photographs, drawings and sketches highlight numerous graphic techniques for planting plans. About the Author THEODORE D. WALKER , ASLA, has been a practicing landscape architect for more than 40 years. Since 1985, he has taught at Arizona State University in the School of Planning and Landscape Architecture.