So, it has the option to download books from Nintendo's wifi and there are 10 books available. They all download, however after restarting the application it detects some corrupt data and deletes 3 of the books. As I noticed, it's always the last three you download, it's not some specific books so it seems like there's a problem with the save (I've tried deleting it and let it create a new one) since the downloads seem to be saved in save file. Could anyone please test this and see if they have the same problem? I'm using firmware 1.56 B4.