If you are in the US the Kindle version of Left Luggage is currently going cheap: US$0.99 – down from the ridiculously over-priced US$2.99 – until the 6th of December. Get it before the digits run out.
I think this kind of promotion only works with the US Amazon site and only if you are accessing the site from the US for some reason – at least I assume that is why it shows up at the regular price on my browser. Let me know if you can see the US$0.99 price from wherever you are. It would be interesting to understand how all this Amazon stuff works.