Google celebrates Mark Twain's 176th birthday today with its latest doodle, which depicts a famous scene from The Adventures of Tom Sawyer.
Although the writer's 176th birthday may seem a somewhat arbitrary milestone to mark, he remains a towering figure in American literature whose works enjoy an enduring popularity today.
Twain is known and loved for his combination of rich humour and sharp social commentary on life along the Mississippi river during the pre-civil war period, and noted for his pioneering use of the vernacular. His treatment of slavery and racism has been the subject of much debate.
Other literary subjects who have received the Google doodle treatment include HG Wells, Antoine de Saint-Exupery, Agatha Christie, Jorge Luis Borges and Stanislaw Lem.