Royal tutor Heine has been tasked with grooming four princes into potential kings. He’s interviewed the proud Prince Leonhard, but three more princes await: the highly intelligent Bruno, freewheeling Licht, and perpetually-glaring Kai. With each prince's personality as unique as the last, interviewing them will prove to be anything but straightforward...
One hundred difficult questions 
covering the fields of
مائة سؤال صعب يغطّي مجالات
Hundert schwierige Fragen
aus den Bereichen
Son 100 preguntas difíciles
Son cien preguntas difíciles
Voici 100 questions très difficiles
en maths, chimie et histoire-géo.
Matematica, chimica, storia e geografia.
Cem questões difíceis que
abarcam a matemática,
Он состоит из вопросов по математике,