In reply to idiotproof (Buxton MC):
The Secret History - Donna Tartt
Foucault's Pendulum - Umberto Eco
Invisible Cities - Italo Calvino
If This is a Man/The Truce - Primo Levi
The Periodic Table - Primo Levi
The Historian - Elizabeth Kostova
Kidnapped - R.L. Stevenson
The Great Gatsby - F.Scott Fitzgerald
These aren't necessarily my favourites but out of my favourites, the ones that I think I'd happily re-read as many times as needed till I lose my marbles.
Luxury would be my Steyr field target air rifle with an endless supply of ammo so I could be the greatest air rifle shot in the world even though nobody else would know it.