"A Much Sought Rarity." —Analog
Written by the woman whose pseudonym was Francis Stevens, and whom fantasy master H. P. Lovecraft placed among "the top grade of writers," this science fantasy classic is suspected to be the first alternate history novel.
The Heads of Cerberus tells of "an alternate-world Philadelphia, reached by a handful of this-world people. This Philadelphia is one in which the political corruptors have become ruthless autocrats, ruling through phony 'civic service' competitions which result in cynically brutal enslavement of the people. The name of William Penn has become, under the organizational label of 'Penn Service,' the very fountainhead of viciously depraved, dictatorial government. Definitely a classic and fun to read." (Galaxy)