The school prom is just around the corner. Bjørg and her friends can barely talk about anything but dresses, fireworks and music. But about a week before the big night, the twins Trym and Trine join the class. The twins quickly become the most popular kids in school, and everyone wants to be their new best friends, including the gang. Although Trym and Trine don’t seem interested in new friends, that doesn’t stop the stubborn Helena. But are the twins really as nice on the inside as on the outside? And does the gang actually want to be their friends?

The funny friends are back in the fourth book about The World’s Coolest Kids!