Have you ever heard of Marichjhapi? A tiny, little-known island in the interiors of Sundarbans, about 75 km east of Calcutta? In 1979, it witnessed a macabre massacre of Bengali Hindu, mostly Dalit, refugees. It is perhaps the single largest pogrom in independent India’s history. Forty years on, Blood Island by Deep Halder vividly reconstructs the buried past of Marichjhapi. The author, a senior journalist, recorded the version of the witnesses and the survivors while investigating the massacre.