Section I: Introduction to Forest Entomology -- 1. Introduction to and the Importance of Insects -- 2. Form and Function -- 3. Forest Arthropod Biodiversity -- 4. Insect Ecology -- 5. Forest Insect Population Dynamics -- 6. Forest Insect -Natural Enemy Interactions -- 7. Forest Insect-Plant Interactions -- 8. Insects and Forest Succession. Section II: Categories of Insects that Damage Trees -- 9. Foliage Feeders -- 10. Bark Beetles -- 11. Ambrosia Beetles -- 12. Woodborers in Forest Stands -- 13. Sap-sucking Forest Pests -- 14. Gall Formers -- 15. Tip, Shoot, Root and Regeneration Pests -- 16. Insects of Reproductive Structures -- Section III: Management of Forest Insect Pests -- 17. IPM: the Forest Context -- 18. Spatial Dynamics of Forest Insects -- 19. Monitoring and Surveillance of Forest Insects -- 20. Silviculture -- Section IV: Future Prospects -- 21. Forest Health in the Anthropocene -- 22. Climate Change and Forest Insect Pests -- 23. Forest Insect Invasions and their Management.