The series adapted books is unique in that a PDF file embedded audio. That is enough to click on a special icon to listen to a certain sentence in the English language by the speaker. Reading is one of the best Practices for one Who Would Like to learn a new Language and the Stories Come with an audio file Which Means That you are Able to read and listen to the story at the same time. All titles are full color with supporting audio. Leveled Readers provide the right level of reading support in any classroom. Enjoy the collection!