Tiff in Time

In the beginning, God created people, angels, and fae. Creatures existing between the spiritual realm and the physical, fae scattered among parallel worlds spreading magic and chaos. The Walker hunts fae, killing them, bringing them to justice. On occasion, he recruits followers. He found Tiff, an orphan, and raised her to be one of his best hunters. A skilled killer, she jumps into any timeline on any alternate, and seeks her prey. A powerful artifact and a mysterious fae crop up in the Roaring Twenties, in Chicago. Tiff is on her way. But this time, after centuries of being hunted, the fae have other plans. . .