Right from our childhood we learn to give order our own way to what we learn and study. This way of organizing knowledge uses also metaphorical images: in fact, metaphor is not just a figure of speech or simple poetic ornamentation, but an important cognitive tool that organizes knowledge through schemes as the ocean, the cave, the network... Operative epistemology, set up by the two authors at the beginning of the 80s, studies these images, which passed down through our culture and history, to analyse and understand the processes of knowledge. Described through 10 metaphors (Tree, Cave, Building, Encyclopedia, Labyrinth, Ocean, Hologram, Path, Network, Wheel of life), our different ways to organize knowledge become a game of 32 cards to be used in different contexts, from training to teaching, to improve work, study and living with other people. Psychologist and epistemologist, Donata Fabbri is head of the CIPC (Centre International de Psychologie Culturelle) in Geneva. She has been Professor of Education Psychology at the University of Geneva. Among her most recent publications: La memoria della regina (2004), La dimensione parallela (with P. d’Alfonso, 2003). Alberto Munari is psychologist and epistemologist, professor of Operative Epistemology in adult education at the University of Padua after running the Psychology and Human Resources Department at Geneva University. Among her publications: Il sapere ritrovato (1993), Strategie del sapere. Verso una psicologia culturale (with D. Fabbri, 1984-2005). Donata Fabbri and Alberto Munari set up, about thirty years ago, Cultural Psychology and Operative Epistemology, on which the training workshops LEO (Operative Epistemology Workshops) are based. Today they are used in different training and human resources programmes in companies, schools, public and private organisations. Mauro Strada is an illustrator and an advertising designer. He set up Studio MS Design specialising in creativity and images for publishing and business. Mauro Strada is a member of the Italian Association of Illustrators.