Kim Harrison is an American author best known for her urban fantasy series, the The Hollows. The series features a world where witches, vampires, and other supernatural beings coexist with humans, focusing on the adventures of a witch named Rachel Morgan. Harrison has also written several standalone novels and short stories, expanding her reach within the fantasy genre. Her work often explores themes of friendship, morality, and the complexities of good versus evil, appealing to a wide range of readers who enjoy imaginative storytelling.