Hello Room 2 Parents,
I came across this great book chart and thought I would share it with you. It gives some ideas of book series that might be right for your child's reading level. The books are ranked by reading level but also include a grade. Eg. You'll notice levels J, K, L are all grade 2. J would be considered beginning grade 2, K would be mid-grade 2 and L is end grade 2.
Here is a link to the website if you have trouble reading the image: http://lehmanlearning.com/wp-content/uploads/2014/03/Book-Series-by-GR-Level.pdf