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From USA Today bestselling author GAJA J. KOS

Werewolf. Coach.

Lover. Spy.

Murder. Mystery. Tennis.

Lotte Freundenberger is not your average werewolf.




Werewolf. Coach. Lover. Spy.

After the War, Lotte gave up the turmoil of pack life to pursue a far more placid career in tennis. Or so she believed.

When a player is found dead at the compound with only days left until the Munich Games, the Interspecies Crimes and Relations Agency rolls in. Senior Agent Isa Vogt suspects foul play and enlists Lotte’s help to discover who stands behind the lethal performance-enhancing drug. 

While separating friend from foe seems like an impossible task, Lotte has no choice but to return to her ruthless werewolf ways—or see another athlete die.

Will she win the hardest match of her life? Join Lotte’s team by picking up your copy of SHADOW MOON to find out.


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. 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. 

Can she see things through without losing herself in the process? Purchase your copy of DARKENING MOON today to find out.


Off the court, the stakes are higher than just a lost match

Isa Vogt is convinced Lotte would make a great agent. But after spending three months cooped up at the ICRA facility, probed and prodded for any genetic changes, tying herself to them willingly is the last thing Lotte wants.

She has the Zentrum. Afanasiy. Her friends. There’s nothing that could convince her to sign away the freedom she has lost one too many times already.

Until a brutal beating leaves her former lover on the verge of death.

Lotte is incapable of waiting idly on the sidelines while the bastard responsible walks free. But if she strikes a deal with Isa Vogt to join the investigation, she will embark on a path she can’t come back from.

Is seeking justice for a ruined life worth ripping apart her own?

Join Lotte as she makes a monumental choice by purchasing a copy of TRANSIENT MOON today!


Shadow Moon

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.


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? Grab your copy of PHANTOM MOON today to find out!

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