How To Delete What You Sell On Amazon?

I'm selling my stories on Amazon, however story 1 and 2 are being re-edited and are a lot more sophisticated and detailed then they were before and I wanted to upload them instead. But, I thought it would be stupid if I uploaded two of the same thing. So I wanted to delete story 1 and 2. But, I have no idea how! It's been a long time since I've been on Amazon.

so if you could step-by-step tell me how to delete them? All I'm getting is how to delete wishlist or other things like that. I'm getting slightly irritated and frustrated. So if you could, I'd love the help.
Added (1). P.S
They're kindle books, not books already wrote like in the library.

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