In Megha Majumdar’s new novel “A Guardian and a Thief,” a cataclysmic climate event in the Bengali city of Kolkata has wiped out shelter and food supplies, leaving its citizens desperate and scrambling for survival. Among the families…

In Megha Majumdar’s new novel “A Guardian and a Thief,” a cataclysmic climate event in the Bengali city of Kolkata has wiped out shelter and food supplies, leaving its citizens desperate and scrambling for survival. Among the families…