Louis-Ferdinand Céline was the pen name of French writer and doctor Louis-Ferdinand Destouches. Considered one of the most influential French writers of the 20th century, he developed a writing style that aimed to capture the rhythm of everyday speech. He remains, however, a controversial figure, partly due to his virulent anti-Semitism. After World War II, France convicted him of being a Nazi collaborator but later granted him amnesty. What punctuation mark was he especially fond of? Discuss