A veteran of the American Civil War who fought at Shiloh and Chickamauga in the Union ranks, Bierce became one of America's best-known writers and journalists, admired for his insolent, entertaining and sometimes courageous columns.

In 1913 he set off for Mexico, then in the throes of revolution, and was never seen again. Ralph Steadman is the author of many illustrated books including Sigmund Freud, I Leonardo, The Big I Am, The Scar-Strangled Banner, Alice and Animal Farm. His most recent publication is the novel, Doodaaa.

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.

Kate Chopin was born in St Louis, Missouri on 8 Feb 1850. Born Katherine O'Flaherty, she grew up in a predominantly female household after her father died when she was just four years old. Her father was an Irish immigrant, and her mother was French Creole.

In 1870 she married Oscar Chopin, a local cotton trader, and together they had six children. In 1882 Oscar died from swamp fever, leaving Kate a widow with a large family to support, and the heir to his sizeable debts. She turned to writing in order to support her young family, publishing her first short story in 1889. A number of her works were subsequently published in literary magazines and popular American periodicals, including Vogue.

Chopin published only two novels in her lifetime: At Fault and The Awakening. The Awakening, published in 1899, was largely condemned as vulgar and immoral by critics of the time. Dismayed by such a harsh reception, Chopin cut short her brief career as a novelist, and for the remainder of her life focused solely on writing short stories, poetry and reviews. Kate Chopin died on 22 August 1904 from a brain haemorrhage.

Kate O'Flaherty was born on February 8, 1850, in St. Louis, of French and Irish ancestry. She was graduated from the St. Louis Academy of the Sacred Heart in 1868; two years later she married Oscar Chopin and went to live with him in New Orleans. They had five sons by 1878, and the following year they moved to Cloutierville, a tiny French village in Natchitoches Parish, in northwest Louisiana. There their last child and only daughter was born in 1879.

After Oscar's death in 1882, his widow ran their plantations and carried on a notorious romance with a married neighbour, but abruptly chose to return to St. Louis in 1884. Within five years she had begun her literary career, and during the next decade she published two novels - At Fault (1890) and The Awakening (1899) - and nearly a hundred short stories, poems, essays, plays and reviews.

Two volumes of short stories mostly set in the Cane River country of Louisiana, Bayou Folk (1894) and A Night in Acadie (1897) were acclaimed during her lifetime. But The Awakening, the story of a woman who has desires that marriage cannot fulfil, was widely condemned, and Chopin's publisher cancelled her third short-story collection, A Vocation and a Voice. Chopin died on August 22 1904.

Edgar Allan Poe (1809-1849) is one of America's greatest and best-loved writers.

Known as the father of the detective story, Poe is perhaps most famous for his short stories particularly his shrewd mysteries and chilling, often grotesque tales of horror he was also an extremely accomplished poet and a tough literary critic.

Poe's life was not far removed from the drama of his fiction. Orphaned at a young age, he was raised by a foster family. As a young man, he developed problems with gambling, debts, and alcohol, and was even dismissed from the army.

His love life was marked by tragedy and heartbreak. Despite these difficulties, Poe produced many works now considered essential to the American literary canon.

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.

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.