In Francisco Serna's blog he touched some very interesting ideas to what the cities themselves stand for in these concise descriptions leading to a puzzle I yet haven't found the key to. Serna talked of Invisible Cities as a map Calvino presents the reader symbolizing a road through literature but I find the book to be much more than that. Not only can you look at aspects like those presented in Marco's expeditions but you find morals to life and kind of underlying meaning with much philosophical background.
"And you know that in the long journey ahead of you, when to keep awake against the camel's swaying or the junk's rocking, you start summoning up your memories one by one, your wolf will have become another wolf, your sister a different sister, your battle other
battles, on your return from Euphemia, the city where memory is traded at every solstice and at every equinox."As I've read through a large portion of the book as well and I do find myself searching for so many lost pieces to this puzzle I don't feel void or empty. On the contrary I feel the cities have shown the Kahn entry to corners of his empire he had never assimilated. Its very weird, but I find Marco Polo's travels as a guide through life and issues that real people face everyday. These troubles are mixed in with the connection the text makes on itself but the book is very far from being meaningless or empty. Serna says he extracts irrelevant messages from the cities but i think he's missed a big portion of the book in which the literal and figurative meanings converge creating the invisibility of these cities.


