The list author says: "When my daughter set out to read this series, we couldn't find a guide to the correct order. Now here it is so you can enjoy this series and keep the timeline straight! (Please note that while some of the Amazon.com images here do not match the books, the book titles are correct.)
I think this is the very best series of books for beginning readers. It offers the appeal of a more "mature" chapter format but keeps the language simple. After a book or two, young readers are devouring the stories, proud of their reading accomplishments, and anxious to read more in the future!"