In 2005, Chinese novelist Hu Wenliang offered 140,000 yuan ($16,900 U.S.) to the reader who could decipher his novel «?», which consists entirely of punctuation marks:
Hu claimed that the symbols represent a touching love story that took him a year to write, but he told the Beijing Daily Messenger that none of the 20 interpretations that readers had so far offered had satisfied him.
“I have my own answer, which is around 100 Chinese characters,” he said. “The interpretation should cover the description of characters and the plot of the story. I will reward someone who can guess 80 percent the hidden story correct.”
That was in July 2005. If anyone has offered a successful solution, I haven’t been able to discover it.