Both Ends of the Night — Marcia Muller

A DESPERATE LETTER, A DISAPPEARANCE...AND A FRIEND'S FIERY DEATH. P.I. SHARON McCONE'S LONG NIGHT IS JUST BEGINNING.

Sharon McCone knew something was wrong when her friend and former flight instructor, Matty Wildress, arranged a flying test for her months before it was due. Her FL's instincts are correct--Matty's lover had mysteriously disappeared and left behind his small son. But things turn deadly when Matty's sabotaged plane crashes, sending the detective into an emotional tailspin. Now embarking on a personal vendetta that will take her across the country, McCone uncovers an insidious web of corporate theft, government corruption ... and murder for hire. While at flight's end, in the cold Minnesota wilderness, a cunning killer awaits...