Passionate about comics from an early age, Mathieu Diez has spent much of his career promoting literature and graphic storytelling. In 2005, he founded the Lyon BD Festival, helping to develop it into an important celebration of comics and graphic literature. He later worked in Lebanon, where he was involved in cultural initiatives and served as an attaché for books and ideas within the French cultural network in Beirut. He was also closely involved with Beyrouth Livres, a major literary festival.
Tout mais pas Beyrouth, published by Delcourt in 2026, is his first graphic novel. It transforms his years in Lebanon into a vivid and moving story, one that explores not only the challenges of living through uncertain times, but also the beauty, humour and extraordinary spirit of Beirut.