This monograph is a result of a doctoral atelier: Methodological Challenge: Studying Mobilities in the Mediterranean, Caiat (Tetouan province), 23- 24 November 2015. With the participation of Carlota Solé, Sònia Parela, Laura Feliu, Natalia Ribas-Mateos as mentors. And with the participation of Francisco Belhorma, Chiara Denaro, Maria Rocco, Cristina Fuentes, Alicia Español, Thales Speroni, Clara Piqueras, Rocío Fajardo and Zakaria Aissa, as doctoral students. We thank the collaboration of Daniel Pinto for the logistics of the seminar. As for the publication we thank the constant engagement of Pablo Pumares and the team of this journal.