Red Summer by Cameron McWhiter

We have largely forgotten the disasters of 1919, which perhaps began with several 13 April lynchings in Carswell Grove GA and continued through the Phillips county AR massacre in late September and early October: "race riots" (which typically involved white mobs attacking blacks, but sometimes included black armed resistance) swept across the country; Charleston, Cleveland, Chicago, Knoxville, Omaha ...

This is a well-written overview of those dreadful days