Dungeon: Duck Heart — Joann Sfar

Welcome to Dungeon, the looniest world of horror and heroic fantasy you'll ever be transported into! This series, a best-seller in many countries, starts with the apogee of Dungeon, a mighty castle filled with monsters, trolls and goblins kept by a wily bird, the Dungeon Keeper, and the object of desire of many an uncouth and disgusting form of life (and afterlife) and Herbert the Timorous Duck is assigned to defend it! Thank goodness, the Dungeon Keeper has assigned Marvin the Dragon, a blood-thirsty, uh, vegetarian warrior, to his side.