The Giver by Lois Lowry
Moon Over Manifest by Clare Vanderpool
A Mango Shaped Space by Wendy Mass
A Wrinkle in Time by Madeleine L'Engle
When You Reach Me by Rebecca Stead
Faith, Hope and Ivy June by Phyllis Reynolds Naylor
As far as classics go, I know they also read Little Women recently (not many liked it) and The Hobbit (which most did enjoy). I think they all particularly liked The Giver.
They have not read To Kill a Mockingbird, as they have all read it for school (some multiple times. But that would be first on my list.