a bit of a booboo from the other day, the book you want to look for is not "5 Essays.." but "6 Memos for the Next Millenium". If I had been paying more attention in class and not trying to think of 6 Memos for the Next Millenium Falcon (#1 was to get that damn hyperdrive fixed) then I might have gotten it right.
I'd lend you my copy, but I can't throw that far.
I think you'd like this one, it's Calvino's final thoughts on Writing that he was presenting as 6 lectures at Harvard. Good stuff.
[edit: don't you do that blue-sad-blinky face at me, young lady...]