The Night You Disappeared (Lieutenant Sierra Lancer #1)

An ex-Navy SEAL with PTSD.
A rookie police officer.
A kidnapping in a small Montana town.
In the heart of Glacier National Park, Sierra Lancer seeks to forget her past. She just wants to keep a low profile, live in solitude, leaving behind the death of her teammates on a mission that went wrong.
However, her world is shaken when her best friend's daughter disappears without a trace. Alongside Agent Rivera, Sierra finds herself entangled in an investigation where each clue they uncover becomes more dangerous.
With several lives at stake, Sierra must trust Agent Rivera and her own instincts before it's too late.