Monteiro Lobato's books are amazing because he not only created incredible imaginative stories (think of Alice in Wonderland), but he added much of the Brazilian folklore and culture to it as well. In addition, in each book he addresses different subjects, such as astronomy, history (one of his books he wrote during world war II where he discusses the issue of war to children), math (yes...there is one book where they travel into the world of arithmetic!), grammar, biology, etc... It's really amazing! His goal was to teach children through fun, imaginative stories, instead of dry textbooks. I think he was the Brazilian "Charlotte Mason" version! Charlotte Mason's followers would have a blast with his books.