The Count of Monte Cristo was an enormous commercial and critical success, captivating readers with its intricate plot and universal themes. Following its publication, Alexandre Dumas earned a fortune but died poor due to an extravagant lifestyle, chronic overspending, and political upheaval. 

Success of the Novel
The novel, published in serial form from 1844 to 1846, was an immediate sensation and remains one of the most widely read French authors globally. 
Popularity: The serialization format, coupled with Dumas' ability to create suspenseful, page-turning narratives, ensured massive popularity among the 19th-century reading public.
Themes: Its exploration of justice, vengeance, mercy, and forgiveness, along with a complex plot and well-developed characters, resonated strongly with readers and secured its place as a classic of world literature.
Enduring Legacy: The book has been translated into numerous languages and adapted into countless films, TV series, and stage productions, demonstrating its lasting cultural influence. 
Life of Dumas After Publication
Dumas became one of the most famous and wealthy Frenchmen of his day, but his life after the novel's publication was marked by extravagance and financial difficulty. 
Flamboyant Lifestyle: He lived a life as dramatic as his heroes, engaging in numerous love affairs and foreign adventures. He was known for his extreme generosity, often granting money and gifts to anyone who asked.
Château de Monte-Cristo: A testament to his success, Dumas built an extravagant mansion on the outskirts of Paris, which he named the Château de Monte-Cristo, along with a theater, the Théâtre Historique, specifically for his plays.
Financial Ruin: Despite earning millions, his lavish spending habits outpaced his income, leading to significant debt. He eventually had to sell the Château de Monte-Cristo property just two years after its completion.
Exile and Travel: In 1851, to escape his creditors, Dumas fled to Brussels. He later traveled to Russia and then Italy, where he founded a newspaper, Indipendente, and supported Garibaldi's campaign for Italian independence.
Later Years and Death: Dumas returned to France in 1864 and continued to write prolifically. He died of a stroke at his son's home near Dieppe in December 1870, far from a rich man, despite his monumental literary success.