Here's Jordan's most current list, in order.
1. A Wind in the Door by Madeleine L'Engle
2. A Wrinkle in Time by Madeleine L'Engle
3. The Sorceress by Michael Scott
4. The Alchemyst/The Magician (a tie!) both by Michael Scott
5. Harry Potter by J.K. Rowling
6. The Tales of Beetle the Bard by J.K. Rowling
7. The Chronicles of Narnia by C.S. Lewis
8. Anne of Green Gables by L.M. Montgomery
9. Charlotte's Web by E.B. White
10. Charlie and the Chocolate Factory by Roald Dahl