I KNOW :D Go to Sweifieh to the street that has a McDonald's branch. It's a one way street so McDonald's should be on your left. BEFORE McDonald's, you'll find a ROLEX shop and right next to it a GUN store which has a whole collection of knives.
There is an excellent book store that is in the same building as Archi Arts on Madina St. It's hidden though along the left side of the building. Sorry, I don't have a name but I promise you'll find what you're looking for.
An ex colleague of mine has a wife who is a Native French speaker and I think is unemployed. Her husband's name is Zaid and his number is 0790370758. Good luck!