Jean-Louis Sagot-Duvauroux, an essayist, has written widely on the subject of free transport, including "Pour la gratuité" (1995, second edition published in 2006 by Éditions de l'Éclat) and "Voyageurs sans ticket" with Magali Giovannangeli (2012, published by Au diable Vauvert). He is also a founder of Malian theatre company BlonBa, for which he has written a dozen plays.