Okay, I admit that as an adult, I don't find the Geronimo Stilton, and now his sister, Thea Stilton, too interesting. However, my dauther, and perhaps the entire 1st, 2nd and 3rd grade LOVE them. Combining colourful design and fonts with mystery-solving seems to really work. Kids trade them, talk about them. And they are non-violent, and sometimes, sometimes, funny.