Woman in Cabin 10. Ruth Ware. 2016.

PASSENGER IS MISSING...BUT WAS SHE EVER ON BOARD AT ALL?

This was meant to be the perfect trip. The Northern Lights. A luxury press launch on a boutique cruise ship.

A chance for travel journalist Lo Blacklock to recover from a traumatic break-in that has left her on the verge of collapse.

Except things don't go as planned.

Woken in the night by screams, Lo rushes to her window to see a body thrown overboard from the next door cabin. But the records show that no-one ever checked into that cabin, and no passengers are missing from the boat.

Exhausted and emotional, Lo has to face the fact that she may have made a mistake - either that, or she is now trapped on a boat with a murderer...