An Exit advent calendar in book form; open the closed pages, read a chapter and solve a puzzle to determine which door to open for the next day. Lea wished that her annoying little half-brother Mikkel would be taken away by the elves, and now he's on the train that takes the elves to Santa Claus in Lapland because he wants to become one himself! Lea has to prevent this at all costs and secretly sneaks onto train. Help her to solve the puzzles she needs to solve to take her brother home again...

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