Samuel Langhorne Clemens, better known by his pen name, Mark Twain, was born on November 30, 1835, in the tiny village of Florida, Missouri.

Writing grand tales about Tom Sawyer, Huckleberry Finn and the mighty Mississippi River, Mark Twain explored the American soul with wit, buoyancy, and a sharp eye for truth. He became nothing less than a national treasure.

American author Pearl Zane Grey (1872–1939) is best known for his popular adventure novels and their idealised images of the Old West. His successful books, including Riders of the Purple Sage, achieved second lives with adaptations for television and more than 100 movies.

Jack London (1876 - 1916), lived a life rather like one of his adventure stories. He was born John Chaney, the son of a travelling Irish-American fortune-teller and Flora Wellman, the outcast of a rich family. By the time Jack was a year old, Flora had married a grocer called John London and settled into a life of poverty in Pennsylvania. As Jack grew up he managed to escape from his grim surroundings into books borrowed from the local library - his reading was guided by the librarian.

At fifteen Jack left home and travelled around North America as a tramp - he was once sent to prison for thirty days on a charge of vagrancy. At nineteen he could drink and curse as well as any boatman in California! He never lost his love of reading and even returned to education and gained entry into the University of California. He soon moved on and in 1896 joined the gold rush to the Klondyke in north-west Canada. He returned without gold but with a story in his head that became a huge best-seller - The Call of the Wild - and by 1913 he was the highest -paid and most widely read writer in the world. He spent all his money on his friends, on drink and on building himself a castle-like house which was destroyed by fire before it was finished. Financial difficulties led to more pressure than he could cope with and in 1916, at the age of forty, Jack London committed suicide.

Titles such as The Call of the Wild, The Sea-Wolf and White Fang continue to excite readers today.

Washington Irving was born in 1783 in New York City. In addition to writing fiction, Irving studied law, worked for his family's business in England and wrote essays for periodicals.

Some of his most famous tales, including Rip Van Winkle and The Legend of Sleepy Hollow, were first published under the pseudonym Geoffrey Crayon.

Willa Cather was born in Virginia in 1873 and moved to Nebraska, with its wide open plains and immigrant farming communities, at the age of nine.

This landscape would deeply affect her later writing. She attended university and became a journalist and teacher in Pittsburgh, and then a magazine editor in New York.

Her first major novel, O Pioneers!, appeared in 1913, and was followed by two more in her prairie trilogy: The Song of the Lark and My Antonia. She lived with the editor Edith Lewis for thirty-nine years until her death in 1947.

O. Henry (1862-1910) had a short but colourful life. Born William Porter in Greensboro, North Carolina, he initially worked as a pharmacist before moving into journalism. In 1896 he was arrested for embezzling funds while working as a bookkeeper for a bank.

In a moment of madness, he absconded on his way to the courthouse before his trial and fled to Honduras for six months. He returned to face trial after learning that his wife was dying of tuberculosis and served three years in jail. While in prison, he adopted the pen name O. Henry, and after his release he found great fame and popularity as a short story writer.