The Hollows

The Hollows series (also called the Rachel Morgan series) is a series of eleven mystery novels, six short stories, one graphic novel, and one compendium resource by Kim Harrison, published by HarperCollins Publishers, in an urban fantasy alternate history universe and set primarily in the city of Cincinnati and its suburbs.

The alternate history is built upon two premises: the recent open existence of magical and supernatural species, primarily witches, vampires, and werewolves, with the human population; and the historical investment of Cold War military spending in genetic engineering as opposed to the Space Race, which resulted in the accidental release of a virus via a genetically modified tomato in the 1960s that killed a significant portion of the human population. The series is set approximately forty years after this plague, referred to as 'The Turn' within the series.