1. We will never know how many copies this book has sold but virtually all sources agree that it is by far the best-selling book of all time. Webster's Dictionary Oxford English Dictionary Guinness Book of Records The Bible

2. This book could not fail to become a best-seller considering its purchase was made compulsory by its author. Which book is the second best-seller? "The Essential Works of Lenin" "Quotations from Chairman Mao Tse Tung" "Mein Kampf" (Adolf Hitler) "The Communist Manifesto" (Karl Marx)

3. Noah Webster wrote the third best-selling book. What was its title? Dissertation on the English Language American Spelling Book An American Version of the King James Bible American Dictionary of the English Language

4. A favourite source of trivia, the idea for this book was conceived in 1954 in an argument over which British game bird flew the fastest. The Book of Lists The World Almanac The Peoples' Almanac The Guinness Book of Records

5. According to its own publicity, this best-selling reference book is "the best-selling U.S. reference book of all time, with more than 80 million copies sold since it was first published in 1868". Poor Richard's Almanac American Heritage Dictionary Roget's Thesaurus The World Almanac

6. These best-selling American schoolbooks covered a wide variety of academic subjects and also emphasised lofty moral values. Readers' Digest Elementary School Primers McGuffey 's Eclectic Readers Dick and Jane Readers Elson-Grey Readers

7. Which author has written the seventh book in the Top Ten Best-Sellers list, and has also won an Olympic gold medal AND run for president of the United States? Benjamin Spock Allan Keyes Dale Carnegie Jesse Jackson

8. Number eight on the Top Ten list is a somewhat obscure book called "A Message to Garcia". Its subject was labour relations and work ethics. Who was its author? L. Ron Hubbard Elbert Hubbard Herbert Hoover Hoyt Wheeler

9. The ninth best-seller on the Top Ten list is called "In His Steps". Whose steps are referred to in this title? Muhammad Martin Luther Jesus Christ Buddha

10. This steamy novel, full of sex and drugs, was first published in 1966. Surprisingly, its sales figures narrowly beat those of classics such as "Gone with the Wind" and "To Kill A Mockingbird" to make the list. "The Valley of the Dolls" (Jacqueline Susann) "Peyton Place" (Grace Metalious) "The Happy Hooker (Xaviera Hollander) "The Carpetbaggers" (Harold Robbins)