positions 21 to 30:

21. Gulliver's Travels, by Johnathan Swift
22. Strange Case of Dr Jekyll and Mr Hyde, by Robert Louis Stevenson
23. Treasure Island, by Robert Louis Stevenson
24. The Exorcist, by William Peter Blatty
25. A Clockwork Orange, by Anthony Burgess
26. I Am Legend, by Richard Matheson
27. Catch-22, by Joseph Heller
28. The Silence of the Lambs, by Thomas Harris
29. Jane Eyre, by Charlotte Brontë
30. Lolita, by Vladimir Nabokov