Who Let in the Sky? A Son's Tribute to His Father Goh Poh Seng's Courageous Struggle with Parkinson's Disease is a family memoir about a son's relationship with his father, lately Canadian and erstwhile Singaporean "literary pioneer" poet, novelist and playwright, Goh Poh Seng, who struggled with Parkinson's disease during the last 15 years of his life until his untimely death in 2010. Kagan Goh pays tribute to his father's courage, his lust for life and his sheer will to survive against all odds. Goh Poh Seng, even in the face of death, was indeed a man drunk on the rage of being alive.