Christensen (business administration, Harvard Business School) teams up with the research director of a major professional services firm to explore why business success is so difficult to sustain. After reviewing the conventional wisdom, they discuss innovation as a predictable process and offer theory-based strategies for, and cases of, sustainable growth. One strategy: develop competencies for future success rather than clinging to those that worked in the past. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)