What order do the land of elyon books go in?

The land of Elyon books go in the following order:

1) The Land Of Elyon Book 1 The Dark Hills Divide

2) The Land Of Elyon Book 2 Beyond The Valley Of Thorns

3) The Land Of Elyon Book 3 The Tenth City

4) The Land Of Elyon Into The Mist

5) The Land Of Elyon Book 4 Stargazer

You must read all of these books in this order to understand the entire series.