Lotte Freundenberger Series by Gaja J. Kos

The Games are over. But the fight has just begun. When one of her coaches goes missing, fixing the club's tarnished reputation becomes the least of Lotte's problems. Especially as her mission to locate Voit puts her in the path of the one person she desperately hoped to avoid. Refusing to subject herself to Isa Vogt's volatile presence for a second time, Lotte forms an unconventional alliance with a demon who's set on bringing her coach to safety... moreThe Games are over. But the fight has just begun. When one of her coaches goes missing, fixing the club's tarnished reputation becomes the least of Lotte's problems. Especially as her mission to locate Voit puts her in the path of the one person she desperately hoped to avoid. Refusing to subject herself to Isa Vogt's volatile presence for a second time, Lotte forms an unconventional alliance with a demon who's set on bringing her coach to safety. But a common goal isn't the only thing Lotte and Afanasiy share. As their attraction deepens and the string of disappearances shifts to murders, Lotte can't bring herself to walk away. From the demon or the case. less

When a hunt becomes a nightmare Lotte barely settled into her new life as an ICRA agent when an executive order sends her on a mission to Berlin—the latest location of a vamp serial killer no one seems to be able to catch. As if the murders involving torn throats and ancient dark magic aren’t troublesome enough on their own, Lotte learns the person responsible is someone she knows. Someone she never believed could go dark. The evidence laid before her is irrefutable... moreWhen a hunt becomes a nightmare Lotte barely settled into her new life as an ICRA agent when an executive order sends her on a mission to Berlin—the latest location of a vamp serial killer no one seems to be able to catch. As if the murders involving torn throats and ancient dark magic aren’t troublesome enough on their own, Lotte learns the person responsible is someone she knows. Someone she never believed could go dark. The evidence laid before her is irrefutable. Only it doesn’t make hunting a loved one any easier. Can Lotte go through with her job? Or will her bias allow a killer to walk free?! less