A collectible box set of George R.R. Martin's A Song of Ice and Fire series is on sale for cheap at Amazon. As part of the retailer's Prime Big Deal Days early book sale, the leather-cloth-bound editions of all five novels in the fantasy series is discounted to only $36.12 (was $85). The 58% discount is the biggest price cut in two years. You need to be a Prime member to take advantage of this deal, otherwise the set will cost you $45.