Berta Bardi i Mila is a Lecturer at the School of Architecture, Polytechnic University of Catalonia (UPC), Barcelona. She has a PhD in Architectural Design. Berta specialises in modern architecture, and the methodology of teaching architecture.

Eduard Altarriba is a graphic designer and illustrator. He runs Alababala, a studio producing games, exhibitions, animation, apps and practical and fun workbooks for children. He has illustrated a number of books published by GMC Publications including, Discovering Architecture, Discovering Energy, My First Book of Electromagnetism, My First Book of Microbes, My First Book of Quantum Physics, My First Book of Relativity, My First Book of the Cosmos, What is War?, Migrants, Politics and Economics. Eduard lives in Barcelona, Spain.