The Guinness Book of Records records a wide variety of human achievements, including in the world of literature.
Once having set a goal, the organizers found out which novel (work of fiction) is considered the longest.
To do this, it was necessary to count all the characters in the work, including spaces.

In the end, Marcel Proust won with his work “Remembrance of Things Past” (Marcel Proust “A la recherche du temps perdu”).
Representatives of the Guinness Book of Records counted approximately 9 million 609 thousand symbols.
The masterpiece consists of 13 volumes.
The first volume of the work was published in 1913.
The published second part of the novel received international awards.
And fame and recognition came to the author immediately after publication.
For reference
The novel is a literary genre, usually prose, that originated in the Middle Ages among the Romance peoples as a story in the vernacular and has now become the most common form of epic literature, depicting the life of a character with exciting passions, struggles, social contradictions and aspirations for the ideal.