Les Miserables, Mockingbird, Screwtape, Ove, Lonesome Dove and This Tender Land
William Kent Krueger's two recent books, "This Tender Land" and "Ordinary Grace" are likely to become classics like "Mockingbird". Can't recommend them highly enough.
Full Titles-
To Kill a Mockingbird
The Screwtape Letters
A Man Called Ove