It is simultaneously one of the most spectacular and most frustrating books I have ever read.

It's phenomenal. I think writers in particular would get something special out of it.

Most interesting points (at least, from the perspective of someone who is studying the art of writing):
-It is written (mostly) in the second person (!!!!)
-It is about (mainly? partially?) about the nature of reading
-It frustrates the heck out of the reader (but I, myself, could not bear to put it down nonetheless)
-It shows some SPECTACULAR examples of hooks, and what a phenomenal hook can do to a reader
-The language is beautiful. Calvino has an incredible translator

There is much more to the book if you read it as a reader as well. It's amazing. There is just too much that I can say about the book. So I'll leave it to two words.

"You read a sentence, get frustrated by its POV and close the book.

Do you:
Throw the book across the room? (turn to page 12)
Set the book on fire? (turn to page 27)
Howl in indignant rage? (just keep the book closed)"