This book explores why inflation surged globally in the 2020s, where we are heading and what lessons we can draw from it. The book introduces a simple economic framework and adopts a global perspective to compare the inflation experiences across the US, Europe, and Asia. Among the key questions the authors tackle is 1) why the West suddenly experienced surging inflation when their central banks had been fighting too-low inflation in the 2010s, 2) why so few economists saw the inflation resurgence coming, and 3) why China now faces deflation.