The following sites contain databases, book lists and online tools designed to help teachers search for leveled books as well as tips on creating one own leveled book library. There is a link to eThemes Resource on eThemes Resource: Recommended Reading for Elementary Students.
This online search tool helps to find children books by reading levels. You can do a quick search by author, title,or keyword as well as leveled search. Also you can find similar books at the reading level you like. NOTE: This site contains ads.
This resource is a compilation of booklist web sites for elementary school students. The lists were compiled by teachers, librarians, and students. Some of the lists are divided by grade level, readability, or genre.