Did you know that there are a ton of really awesome middle-grade books that you can read for free on Kindle Unlimited? In fact, I think there are even more books for tweens than there are for adults, at least in terms of big titles from well-known authors. In some cases, you can read the entire series as part of your membership. In most, though, you only get the first book and have to buy (or borrow from a library) the rest.
