Final answer:
Agatha Christie's disappearance for 10 days without revealing what happened remains an unsolved mystery that sparked a massive manhunt and generated a lot of publicity.
Step-by-step explanation:
Agatha Christie's mysterious disappearance for 10 days without revealing what happened has become an unsolved mystery. In December 1926, Christie disappeared, leaving behind a letter. Her disappearance sparked a massive manhunt and generated a lot of publicity. She was eventually found at a hotel, claiming amnesia and not remembering anything about her disappearance. The true reasons behind her disappearance remain unknown, and it continues to be a fascinating aspect of Christie's life and career.