There is something moral to design things that will last for a very long time, for me it is important to visit the modernists. It is always stimulating and joyfull to visit the permanent collection of the Centre Pompidou.
If you're looking for somewhere that has an an excellent selection of artist books then Yvon Lambert is the place to go. Not only that but they sell incredible tote bags, with great straps and nice minimal design that will last you a life time. Out the back is a small gallery space, often showcasing the work of featured artist who's book is for sale in the shop. One of my favourite things about this shop is how friendly and welcomign they are! Not only that but they do cool collaborations, such as the one with David Horvitz, where he emails them a new photograph of the sky every day, the bookshop prints it out and you can only buy that one image on the day.
Paperboy has a very cool and friendly atmosphere. You get fresh food and very delicious sandwiches! Perfect shop to have lunch after exploring the neighborhood.