I’ve never thought about reading Alice in Wonderland or the Brothers Grimm in another language - those seem perfect for my level. Thanks for the great ideas!
I'm currently reading the first 2 books of Diary of a Wimpy Kid in German. Apparently, you can find the books in 56 different languages. I'm finding them a bit above my level, but I would say they would be perfect for someone at B1 level
Thank you so much for your positive feedback Andrew! This means the world to me. Can't wait to further improve my languages and learn new things in general :).