*If you're not knowledgeable to literature (or at least this book) don't bother reading the thread, I'll save you some time there*

Well essentially this is a book i really want to read (No. 44 The Mysterious Stranger by Mark Twain, that is) but i am aware that this was never an officially finished book so i am concerned as to buying the best definitive version of it.

I was on Waterstones and found one for £1.90 called The Mysterious Stranger (and other stories)
here: http://www.waterstones.com/waterstonesweb/displayProductDetails.do?sku=3571814

One called No. 44 The Mysterious Stranger for far more, £9.50
here: http://www.waterstones.com/waterstonesweb/displayProductDetails.do?sku=3571814

So i was wondering, does anyone know if the cheaper one is a different or worse draft of the novel? Because as much as it is FAR cheaper, i want to get the best version.