So, I have a couple lists I've made/am working on with banned books in different genres and I've realized while making these that my own knowledge on banned books is very biased toward America (where I live). So, I'd love it if y'all can let me know what books are banned where you live (and why) and tell me what the first book you think of when you hear "banned books" is.

Additionally, what makes a book a banned book? Does it just have to be challenged at some level, does it have to be removed from shelves at a book chain or library, does a government have to ban it completely?