Introduction -- Section 1. Introduction to Key Concepts -- 1. Foundations of Intellectual Disability -- 2. Communication as a Basis for Person-Centred Support -- 3. Care in a Multi/Interdisciplinary Context -- 4. Attachment, Cognitive Dissonance and Reciprocation in Intellectual Disability Care Provision -- Section 2. From Birth to Adolescence -- 5. The Nature of Intellectual Disability -- 6. Children and Adolescents with Intellectual Disability -- 7. Intellectual and Developmental Disabilities and Rare Diseases -- 8. Other Neurodevelopmental Conditions -- Section 3. From Adulthood to Older Age -- 9. Chronic Health Among Those with Intellectual Disability -- 10. Ageing and Intellectual Disability -- 11. Intellectual Disability, Mental Health and Mental Disorders -- Section 4. Integrating Health and Social Perspectives -- 12. The Social Contract of Care for People with an Intellectual Disability -- 13. Enabling Families to Support Adults with an Intellectual Disability to Live a Life of their Choosing.-14. Social Integration and Inclusion -- 15. Supporting Transitions -- 16. Sexuality, Gender Identity and Relationships.