Most of these are book lists I have used and enjoyed for our family! When you have one or more voracious readers, you’ve got to stay ahead of them! There was no way I could preview all books before my daughter read them. These are the lists I trusted (or would trust if I’d known about them at the time) to give me high quality selections that promote the True, the Good, and the Beautiful. (That doesn’t mean there is nothing ugly or evil in these books. Far from it! But sometimes you need to see how dark evil is in order to see the true strength and light of the Good.)
Reshelving Alexandria (requires membership to view all books)
Sonlight (Christian)
Bookshark (secular)
Sabbath Mood Living Science Books
Ursa Minor (7th-12th grade)
Ambleside Online (check especially the literature and read aloud sections)