Dear BB,
I must admit that I am one who does not review other's web sites. However, here is a web site I have found and use in my consultancy work with several local US School districts: www.readinga-z.com

This web site is a great resource as it provides teachers the opportunity to download a variety of small readers for all age levels and all subject areas for free. Also, if you are interested, you can purchase an individual license that allows you to download as many books as you want. The license is good for one year.
My recommendation to the teachers and districts I work with is to take these mini-books, laminate them, and then have them to use over and over again with students.
I hope this information has been helpful.
Regards,
Dr. Yanni Zack