Sylvain Cypel, senior editor at Le Monde, joined the paper in 1998 as deputy head of the international section, following a five-year tenure as editor in chief of Courrier International and a stint as deputy editor in chief at the journal Les Echos. Cypel has long worked for the daily Le Matin de Paris and as a freelance journalist for France 2, Liberation, and other media outlets, often covering the Middle East. He holds degrees in sociology, contemporary history, and international relations, the last of which he earned at the University of Jerusalem. He lived in Israel for twelve years, and is now based in Paris. Walled was originally published in French; the Spanish translation of the book has been awarded the 23rd "Francisco Cerecedo" Journalism Prize from the Association of European Journalists.