Chapter 1. Introduction to Lung Diseases -- Chapter 2. Introduction to Epigenetics -- Chapter 3._Epigenetic mechanisms in Inflammation -- Chapter 4. Epigenetic regulator of inflammatory gene expression -- Chapter 5. Epigenetics of Asthma -- Chapter 6_. Epigenetic optimization in chronic obstructive pulmonary disease (COPD -- Chapter 7. Epigenetics of Lung Cancer -- Chapter 8. Epigenetics of Pulmonary Tuberculosis -- Chapter 9. Epigenetics of Idiopathic Pulmonary Fibrosis -- Chapter 10. Epigenetics of influenza-A virus infection -- Chapter 11. Epigenetics of rhinovirus -- Chapter 12. Epigenetics of SARS-Cov2 (Covid-19) -- Chapter 13. Epigenetics of Haemophilus Influenzae -- Chapter 14. Future Prospects and Challenges -- Chapter 15. Targeting epigenetics in pulmonary arterial hypertension.