Are you planning a trip to Paris? If so, I would recommend getting this little book. It’s about 8 Euro and is invaluable when you are riding the metro, bus, or RER and trying to figure out where to go. It breaks down all 20 arrondissements (french word for neighborhood) inside Paris and even tells you where you can find every metro station and bike rental stations. Whenever I travel to Paris I always take my book with me because it’s so convenient, it fits in my purse and can even fit in your back pocket (although I wouldn’t recommend you keeping it there). There are different ones to choose from, my mom has one that has a blue cover. But no matter which one you choose, the information inside is exactly what you need to get you to where you want to go.