By randy leffingwell. With the Porsche 911 buyer 's guide, author randy leffingwell has created the most comprehensive resource ever available to guide you through the potential pitfalls of purchasing one of these fabulous automobiles. This year-by-year guide will help you select the model and year that is best for you, which features you need and which to avoid, and what flaws to watch out for. 252 pages, softbound, color throughout.