Tracking The Tempest: Book 2 in the Jane True series by Nicole Peeler
Jane True always knew she wasn't quite normal - but she never expected to discover she had a supernatural heritage. Now she's struggling to hone her new-found powers as a halfing, including her affinity over water. Luckily, her steamy relationship with vampire Ryu helps to keep her mind off things somewhat ...But Jane's life won't get simpler any time soon. While visiting Ryu in Boston, she becomes entangled in an investigation involving a spree of gruesome killings. All evidence points towards a being of tremendous power - who, much to Jane's surprise, may just turn out to be another halfling.