How many game of thrones books?

I'm buying a box-set with all the books, but I'm a bit confused because there are box-sets with 5 books and others with 7. For example, I want to buy this one: http://www.bokus.com/bok/9780007477159/a-game-of-thrones-the-story-continues/ But this one has 7 books, while several sites say these are the... show more I'm buying a box-set with all the books, but I'm a bit confused because there are box-sets with 5 books and others with 7. For example, I want to buy this one:
http://www.bokus.com/bok/9780007477159/a-game-of-thrones-the-story-continues/
But this one has 7 books, while several sites say these are the published ones

A Game of Thrones
2 A Clash of Kings
3 A Storm of Swords
4 A Feast for Crows
5 A Dance with Dragons

The link I referred to has the following ones:
A GAME OF THRONES
A CLASH OF KINGS
A STORM OF SWORDS, 1: STEEL AND SNOW A STORM OF SWORDS, 2: BLOOD AND GOLD A FEAST FOR CROWS A DANCE WITH DRAGONS, 1: DREAMS AND DUST A DANCE WITH DRAGONS, 2: AFTER THE FEAST
The last part is so confusing I can't even tell which words belong to which title. If someone could help me sort this out it would be great.

Thanks in advance!
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