One of my favorites is "Time and Again" by Jack Finney. It takes place in Manhattan and goes back and forth between 1882 and the 1950s. It's really a cult book.
Alice HoffmanMy grandmother was overwhelmed by what was happening to us. She ahd moved back into the past because the here and the now was too terrible.
Alice HoffmanI read Betty Smith's "A Tree Grows in Brooklyn," all of Shirley Jackson's books, which I loved.
Alice Hoffman