Dungeon (Donjon; more than 30 volumes), co-written with Joann Sfar, an extremely ambitious series which attempts to chronicle a Dungeons & Dragons-like dungeon through three separate epochs.
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Trondheim's greatest breakthrough after Lapinot is arguably Dungeon (in French, Donjon), an ambitious series which he created with Joann Sfar, and which has enjoyed a fair amount of popular success.
In 1994, he partakes in an exposition of young talents at the Angoulême International Comics Festival with Lewis Trondheim and others.
Under the banner of First Second Books, located in the Flatiron Building in New York City, Siegel is the editor of works by authors and artists such as Joann Sfar, Eddie Campbell, Paul Pope, Jessica Abel and Lewis Trondheim, Jane Yolen, and Adam Rapp.
Lewis Carroll | Trondheim | Jerry Lee Lewis | Jerry Lewis | Lewis | C. S. Lewis | Carl Lewis | John Lewis | Sinclair Lewis | Huey Lewis and the News | Michael Lewis | Juliette Lewis | Lewis gun | Lewis & Clark College | Lewis Hamilton | Lewis Carroll's | Daniel Day-Lewis | Lennox Lewis | Huey Lewis | Stephen Lewis | Ramsey Lewis | Lewis and Clark Expedition | Michael Lewis (author) | Lewis Black | Damian Lewis | Meriwether Lewis | John Lewis Partnership | Jeffrey Lewis | Fort Lewis | Tom Lewis |
In 1992, he became a member of the "Atelier Nawak" (later the Atelier des Vosges) and their publishing branch L'Association, working together with people like Joann Sfar, Lewis Trondheim, David B., and Christophe Blain.
Lewis Trondheim, Ruppert et Mulot and Émile Bravo have made guest appearances in the project Chicou-Chicou.