Bow Valley College (Alberta) has developed a series of graded audiobooks for Literacy learners, with seven levels to meet the different stages of reading development.  Level A books present a single sentence per page and large images;  Level G books contain images and paragraphs with more complex language and concepts.   You will find two versions of each reader along with information on the complexity of the text, structure, and vocabulary. The Audio Book has a preview of the contents. The printable PDF has print settings beside each reader. There are a total of 40 audio books to choose from, with five to seven readers at each level.

Free access:

https://globalaccess.bowvalleycollege.ca/esl-literacy-readers#section-1264