 An audio book exists as well.The book themes around the adventures of a pupil called Tobias Findteisen (nicknamed Tobbi) who accompanied the robot ROB 344–66/IIIa (nicknamed Robbi) to help with the latter's exam at robot school.The team travels in an all-in-one vehicle, designed by Tobbi and built by Robbi, to find answers to the exam's riddles all over the world.