Phantom Pain: Alpha Mated #4 (Alpha Billionaire Werewolf Shifter Romance) - Alpha Mated, #4

A new dark shadow envelops Dakota Combes's strange world as personal collides with paranormal once again.  Her friend at the office develops an illness with symptoms of fatigue and undeath.  Her mate leads her to someone who might know, a doctor with more up his sleeve than a stethoscope.  Together the group of strange friends must go against a phantom that intends to rejoin the living, even if the effort costs their lives.
The Alpha Mated series is an episodic serial where each book contains a conclusive story within an over-arching tale of sensual fun.