For her journey to end, Ruby must return to the beginning. After bounty hunter Ruby Callaway receives a cryptic note from an old nemesis, she sets out on a journey for the Tributary, a Realm long believed to be just a myth. Legends say that the Tributary is the source of all magical life - powerful enough to end MagiTekk's rule. And now Ruby has just twelve hours until the supposed entrance is sealed off forever. But MagiTekk has heard rumors of the Tributary's legendary magic as well. And they have some secrets lurking in the shadows that will ensure the Realm's power winds up in their hands instead... Blood River is the thrilling conclusion to The Ruby Callaway Trilogy, which blends urban fantasy with dashes of cyberpunk, dystopian, and sci-fi into an explosive, original cocktail.