Ch. 1. Choosing and Organizing Observations and Experiences -- Ch. 2. The Empirical Evidence -- Ch. 3. The Detailed Structure of the Spectrum -- Ch. 4. Toward a Mathematical Model -- Ch. 5. Feeding Relationships in the Spectrum -- Ch. 6. Physiological Bases for Spectra -- Ch. 7. System Properties of Biomass Spectra -- Ch. 8. Alternative Views of the System Underlying Fisheries -- Ch. 9. Levels of Ecological System Output -- Ch. 10. Implications for Fisheries Management -- Ch. 11. Final Observations