Katcher, an industrial/organizational psychologist who runs a management consulting firm, and Snyder, a freelance business writer, offer a guide for independent consultants and those wishing to enter the field to aspects of consulting, including the economic realities; choosing a business model; finding a niche; establishing credibility; developing and implementing a marketing plan; marketing through writing, speaking, and networking; writing business proposals; selling services; delivering results and making sure recommendations are implemented; avoiding problems with motivation, loneliness, and money; and conducting research. Advice drawn from a survey of 200 consultants is interspersed throughout. Annotation ©2011 Book News, Inc., Portland, OR (booknews.com)