Midnight Come Again — Dana Stabenow

Reeling from the shocking murder that shattered her world, private investigator Kate Shugak has vanished into the vast Alaskan wilderness just when Jim Chopin needs her most. The dauntless Alaska State Trooper is ensnared in an intricate case involving the Russian Mafia and a cache of stolen plutonium--a case that will launch him on a treacherous solo undercover FBI assignment in the far western reaches of Bering. Only when he arrives in the remote coastal settlement does an astonished Jim discover that he isn't the only one who's gone incognito...

Seeking solace in a new name, a new appearance, and a new life, Kate puts in eighteen-hour days handling freight for an independent airline. Yet not even the backbreaking labor provides adequate diversion from her inconsolable grief--nor does Jim's unexpected appearance ... at first. Kate and Jim soon find themselves drawn headlong into a case that is far more twisted, and dangerous, than either of them ever could have suspected as it soon becomes violently clear that the theft that launched their investigation is only the tip of the iceberg...