Ash by Jaymin Eve and Leah Stone

A slightly different take on the monsters. Vampires were created when bats with a virus bit humans, and are the usual stronger, faster, bloodsucking night dwellers. When they breed with human women, the male offspring are called Ash, with many of the same abilities as vampires, including the need to drink blood, but who are able to move around in daylight. An uneasy truce with the humans has been reached, and the Ash live in Hives located in major cities. The place of this story is Portland, Oregon.

Charlie is a college student who believes herself to be human, but one day she makes the terrifying transformation into a creature which is not supposed to exist, a female Ash. She is taken into the Hive and submitted to "the culling". There are too many Ash created each year, so they must earn their way into the existing vacancies in each hive by fighting each other to the death. With the help of the chief enforcer of the Portland hive, Ryder, and a powerful vampire sponsor, Charlie gets through the culling and is admitted into her new life.

But there are mysteries surrounding her origins and what abilities she might have, so she is drawn into conflicts with larger political implications.

A quick and fun read.