This week's Friday Brain-Teaser from xrefer tests your knowledge of novels and novelists. Answers here.

1. Iris was the title of a film in 2001 about the life of which novelist?
2. The first novel by the English author Douglas Adams, published in 1979, was called The Hitch-Hiker's Guide to... - what??
3. Which novel by George Orwell begins with the sentence: "It was a bright cold day in April, and the clocks were striking thirteen?"
4. In D. H. Lawrence's 1928 novel Lady Chatterley's Lover, Lady Chatterley responded to the advances of her gamekeeper. What was the gamekeeper's name?
5. Which 19th-century English novelist wrote The Warden, Barchester Towers and Dr. Thorne?
6. Who wrote the novels The Shipping News in 1993 and Accordion Crimes in 1996?
7. In Britain, the first Harry Potter book was called Harry Potter and the Philosopher's Stone. Which word was substituted for "Philosopher" for the US version?
8. Which French author wrote the licentious novels Justine in 1791 and Juliette in 1797?
9. Philip Pullman is famous for His Dark Materials, a set of three novels. Give the titles of two of them.
10. Which well-known English novelist has published detective novels under the name of Dan Kavanagh?