High Quality Content by WIKIPEDIA articles! The Hollows series (also called the Rachel Morgan series) is a series of mystery novels in an urban fantasy alternate history setting by Kim Harrison that take place primarily in the city of Cincinnati. The city itself is mostly separated in two parts: The main part of the town (usually called downtown) and the enclave on the opposite side of the Ohio River nicknamed "The Hollows". Most Inderlanders in Cincinnati live on "The Hollows", although exceptions exist on both sides.