Larry Ferlazzo has a great list to help all of us with the voluntary reading issue. I am sure you will find a resource you can use.
“Extensive reading (also known as Sustained Silent Reading or Free Voluntary Reading), the idea of having students read text of their own choosing without necessarily having to do book reports, etc, is an important instructional strategy that many of use. Its academic benefit has been widely documented, especially by Stephen Krashen.
I thought it would be useful to pull together some of research that backs-up its effectiveness.
Here are my choices for The Best Resources Documenting The Effectiveness of Free Voluntary Reading:”