I read AVI - Afraid of the dark? (AVI-E4)

Marte and Hidde are on vacation. But then something happens to dad and Marte is the only one who can get help. But then she has to go through the woods in the dark ... on her own! Will she dare?

Marte is afraid of the dark.
Her twin brother Hidde teases her about it.
Then they go to a house in a forest for a week.
Something happens and the lights in the park go out.
There is only one solution.
Marte has to go through the dark alone…