How do apples grow?

I'm not sure where, but recently I stumbled across the idea of the Read-and-Find-Out Science books and this is the first one I've picked up to read and I am highly impressed. Not only are the details and text fabulous and informative, but the illustrations are gorgeous. I will be looking for more of these. Our library had this one, and I'm not sure if these are a necessary to buy or just borrow, but either way necessary to experience.