I think it's necessary to choose books that one has already re-read at least once.
- The Lord of the Rings
- Kim
- Pride and Prejudice
- A Wizard of Earthsea
- The Misenchanted Sword by Lawrence Watt-Evans
With Kidnapped/Catriona just missing the list.
Naturally, if we were allowed big omnibus editions, add in The Hobbit, The Silmarillion and Unfinished Tales to LoTR, The rest of Jane Austen's novels to Pride and Prejudice and finally, The Tombs of Atuan and The Furthest Shore to A Wizard of Earthsea.