This is even better for those with Amazon Prime because you get to avoid the postage charge and just choose one if you want.
But for those without you can pick up both for £5.98.
The Road isn't the longest of stories, but it's a good read nonetheless. Let The Right One In is pretty meaty and is excellent - just like the movie!
(p.s. The Road is listed in the 'Customers also bought' section :)