Marco Tomamichel is a world-leading researcher in the field of quantum information theory and cryptography. He graduated with a MSc in electrical engineering and a PhD in theoretical physics from ETH Zurich (Switzerland), close to where he grew up on the shores of beautiful Lake Zurich. He has since worked at different universities in Sydney and Singapore. While his focus is usually on scientific articles, his wife and growing family inspired him to try it with a children's book as well.