Yes! Your ELL students will benefit tremendously from reading these books. The power will come with the extension activities that come with the books.
For more practice, the games and activities will solidify students' understanding of the English language.
It's important for students to know ALL the sounds of the alphabet, have a good understanding of long and short vowels sounds.
If your ELL students haven't built that foundation yet, check out The Foundations Kit  in our free Member's Hub.