when was it published?
1843
A Christmas Carol
A Christmas Carol. In Prose. Being a Ghost Story of Christmas, commonly known as A Christmas Carol, is a novella by Charles Dickens, first published in London by Chapman & Hall in 1843 and illustrated by John Leech. 
who are the ghosts in a christmas carol Jacob Marley who is the author of this novel? Charles Dickens
wiki:13390881
A Christmas Carol [SEP] Introduction
A Christmas Carol. In Prose. Being a Ghost Story of Christmas, commonly known as A Christmas Carol, is a novella by Charles Dickens, first published in London by Chapman & Hall in 1843 and illustrated by John Leech. "A Christmas Carol" recounts the story of Ebenezer Scrooge, an elderly miser who is visited by the ghost of his former business partner Jacob Marley and the spirits of Christmas Past, Present and Yet to Come. After their visits, Scrooge is transformed into a kinder, gentler man. Dickens wrote "A Christmas Carol" during a period when the British were exploring and re-evaluating past Christmas traditions, including carols, and newer customs such as Christmas trees.