"The Haunted Man and the Ghost's Bargain" is a novel by Charles Dickens. It tells the story of Professor Redlaw, a chemistry teacher tormented by a painful past who is granted his wish - to forget all painful memories - by a spectral doppelganger. However, not only are the professor's personal sorrows erased, but he unintentionally spreads an infectious forgetfulness to others he encounters. The novel explores themes of regret, memory, and the power of love and forgiveness in healing past sorrows.