The Protector's War is a 2005 alternate history, post-apocalyptic, science fiction novel by American writer S.M. Stirling. It is the second novel in the Emberverse series. The Protector's War describes the events of roughly a year, some eight years after the Change which altered the laws of physics in Dies the Fire. It describes the preparations of the Portland Protective Association for a war of conquest against the other communities of the Willamette Valley, their actions in response, and the arrival of three English refugees whose coming will help shape events in Oregon.

Dies the Fire is a 2004 alternate history and post-apocalyptic novel written by S. M. Stirling. It is the first installment of the Emberverse series and is a spin-off from S. M. Stirling's Nantucket series in which the Massachusetts island of Nantucket is thrown back in time from March 17, 1998, to the Bronze Age.