Chapter 1. Neuro-stimulator Use in Obstructive Sleep Apnea-Past, Present and Future -- Chapter 2. Positive Airway Pressure Therapies: Advances of the Decade -- Chapter 3. Advances in Alternate, Non-PAP, Non-surgical Therapies in the treatment of Obstructive Sleep Apnea -- Chapter 4. Perioperative Assessment and Management of patients with Sleep Disorders -- Chapter 5. Central Sleep Apnea: Advances in the last decade -- Chapter 6. Current Clinical perspective of Adult Obstructive Sleep Apnea: Symptomatology; Clinical features / Different Phenotypes. Chapter 7. Is Screening of Obstructive Sleep Apnea necessary? Current Perspectives on Screening/Diagnosis -- Chapter 8. Diagnosis and Management of OSA comorbid with insomnia (COMISA) -- Chapter 9. Sleep Tele Medicine during COVID Pandemic and Post-Pandemic period' -- Chapter 10. Wearable Technologies/Consumer Sleep Technologies in relation to sleep disorders-Developments in the last decade -- Chapter 11. Traffic Safety in Sleep Deprivation, Sleepiness, and SleepDisorders -- Chapter 12. Advances in the Surgical treatments for Snoring and Obstructive Sleep apnea -- Chapter 13. Impact of REM on Sleep Disorders: Current perspectives -- Chapter 14. COVID pandemic impact on OSA and other sleep disorders -- Chapter 15. Sleep disturbances in hospitalized and Intensive Care Unit patients -- Chapter 16. Recent advances on Sleep during Pregnancy and postpartum -- Chapter 17. Updates in Pediatric Sleep Apnea.