In my classroom, we use reader's workshop. This rubric helps to easily grade student's understanding of their novel and participation in the group discussion. Every student has a column and is graded on their responses. You can use this spread out over many lessons or as a final discussion rubric. I also like to give this to my students ahead of time so they can think about their responses which usually leads to higher level answers.
I teach grade 7, but this could be used for any grade. I designed a list of great books for middle school as well- be sure to check that out on my store!