Kara and her class play a new game on their iPads. It is funny and exciting to see everyone yell and curse, if something bad happens in the game. But it is just a joke. Or is it? Kara does not know, and it makes her feel weird.

This is the seventeenth book in the series about Kara and her friends. The books can be read separately.

Line Kyed Knudsen was born in Gentofte in 1971. She debuted in 2003 and since then, she has written over 50 books for children and young adults. She often writes stories about friendships between girls. She has been nominated for several awards, and in 2007 she received Gyldendal's Pippi-award.

The books about Kara are inspired by her own childhood experiences as well as the experiences of her own daughter.