Two wellknown japanese cafeteria, close to the Louvre and the Palais Royal. Gyoza and Lamen served all day long. The one Rue St Anne is more traditionnal, chiefs are cooking in front of you. Often packed, in case there is a long waiting line, go to the one Rue St Honoré, you will eat the same!
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.