The depth and breadth of Larsen’s research always amazes me.  His non-fiction reads like compelling  fiction.  This book centers around the Chicago’s World Fair/Columbian Exposition of 1892–how it was planned, designed, and built (including detailed background on every architect and every building).  But it’s also about a crazy murdering doctor, HH Holmes, and his spree of eliminating young women.  The stories converge, but also seem disconnected.  It’s a strange combination.  I found the Expo story far more fascinating and informative.  (non-fiction)