SCM’s recommended books can be found on our Free Curriculum Plan: Overview Charts, though you have to follow a lot of links to get the recommended books for all the subjects.
You can search for our recommended books on the CM Bookfinder too. There are SCM tags you can search by that give our recommended books for each grade, history time period, and more. Also, if you are using the CM Bookfinder to search for books on other topics, any books with a green SCM next to them are recommended by us.