Hal is on his most dangerous adventure yet as he deals with thieves, an assassin, and the cold cold arctic!

Harrison "Hal" Beck has been on countless adventures with Nat, his travel journalist uncle, and filled countless sketchbooks with his crime-solving art. This time, they're off to see the northern lights in the Arctic--a Christmas present from Uncle Nat to Hal.

But when Hal joins his uncle in Sweden, their tourist plans are quickly derailed. Someone broke into Uncle Nat's friend's house in search of a "Kill Code" sound frequency they think she has. It's a frequency that has the power to kill many people, so it cannot fall into the wrong hands. And are Hal and his uncle being followed?

As if that isn't worrying enough, a man from Uncle Nat's past has resurfaced: someone who holds a grudge against Uncle Nat for the role Nat played in his attempted murder.

With an assassin on the loose, a potential stalker on their trail, and the "Kill Code" being searched for, Hal is in for his scariest and most dangerous ride ever!

Catch Hal's other adventures in: The Highland Falcon Thief Kidnap on the California Comet Murder on the Safari Star Danger at Dead Man's Pass Sabotage on the Solar Express