The union catalogue WorldCat has listed the 100 novels which are found in the most libraries.
Of these the top 10 are:
- Don Quixote by Miguel de Cervantes
- Alice’s Adventures in Wonderland by Lewis Carroll
- The Adventures of Huckleberry Finn by Mark Twain
- The Adventures of Tom Sawyer by Mark Twain
- Treasure Island by Robert Louis Stevenson
- Pride and Prejudice by Jane Austen
- Wuthering Heights by Emily Brontë
- Jane Eyre by Charlotte Brontë
- Moby Dick by Herman Melville
- The Scarlet Letter by Nathaniel Hawthorne
The complete list is here.