May Day by Josie Jaffrey

If the murderer you’re tracking is a vampire, then you want a vampire detective. Just maybe not this one. It’s not that Jack Valentine is bad at her job. The youngest member of Oxford’s Seekers has an impressive track record, but she also has an impressive grudge against the local baron, Killian Drake. When a human turns up dead on May Morning, she’s determined to pin the murder on Drake. The problem is that none of the evidence points to him. Instead, it leads Jack into a web of conspiracy involving the most powerful people in the country, people to whom Jack has no access. But she knows someone who does. To get to the truth, Jack will have to partner up with her worst enemy. As long as she can keep her cool, Drake will point her to the ringleaders, she’ll find the murderer and no one else will have to die. Body bags on standby. May Day is the first book in Josie Jaffrey’s Seekers series, an urban fantasy series set in Oxford, England.

The Wolf and the Water by Josie Jaffrey

Some secrets are worth killing for The ancient city of Kepos sits in an isolated valley, cut off from the outside world by a towering wall. Behind it, the souls of the dead clamour for release. Or so the priesthood says. Kala has never had any reason to doubt their word - until her father dies in suspicious circumstances that implicate the city's high priest. She's determined to investigate, but she has a more immediate problem: the laws of the city require her mother to remarry straight away. Kala's new stepfather is a monster, but his son Leon is something altogether more dangerous: kind. With her family fractured and the investigation putting her life in danger, the last thing Kala needs is romance. She would rather ignore Leon entirely, however difficult he makes it. But when she learns the truth of what really clamours behind the wall at the end of the valley, she faces a choice: share what she knows and jeopardise her escape, or abandon him to his fate along with the rest of the city. If she doesn't move fast, then no one will make it out of the valley alive.