In the Footsteps of Bicycle Thieves

In the fourth book of the Northern Sea Detectives series, the detectives head to a small resort island of Langeoog. Vacation! Summer, sun, beach. But suddenly, all the bicycles of the Janssen family disappear. Emma, Lukas, and their parents are puzzled: is this someone's harmless joke or something more?

It's great to have with you the "Guide for Real Detectives - Basic Rules" by their great-uncle Theodor Janssen. Without thinking long, Emma and Lukas start investigating the new case. They are assisted by a girl with a cool appearance - with half a shaved head and an earring made of dyed seagull feathers. Together, they not only find their bicycles and track down the leader of the cunning kidnappers, but also save a police officer's life.