Every two or three years I re-read most of Dickens, and much of Mark Twain; neither of which ever get old for me.
Also: all of Annie Proulx, LOTR, Frank O'Conner.
Just re-read Jack Whyte's series about Arthur.
Others.....Ursula Leguin,Edward Rutherfurd's Sarum, The Forest, and London; and not long ago, a series of children's books I had read,as a chold by Thornton W. Burgess ( Bowser the Hound, Old mother West Wind, etc.)