Just a little word of advice.

Paris is a great city but don't burden yourself with too much reading material. A good illustrated map which shows you the highlights is sufficient. I have seen too many tourists with their noses plunged into guides that in the end they missed looking at Paris...

Just follow your nose and listen to advice when you are there. There will always be someone you'll meet who'll tell you where to go and what to do.

Enjoy the atmosphre, take a metro pass and just roam the city.