It's funny how the three series I read over and over are all written by British writers. I reread C. S. Lewis about once a year, but Tolkien and Rowling I read more often. Dickens and Twain are other authors I like to reread as well. Books become like old friends whether it is fighting Voldemort with Harry, seeing Peter, Susan, Edmund and Lucy crowned, or floating down the Mississippi with Huck Finn.