A writer on a book tour that included Iowa this week has written a novel that tells the story of people who are raising their grandchildren. Michael Morris’ new book, “Long Way Home,” deals with a mother who can’t handle child-rearing in her troubled life.He says as far as he knows, no other novel has addressed this. Morris says growing up in the south he knew of grandparents who were raising grandchildren, but today he sees it everywhere. The author is greeted at his stops by people who tell him they relate to the characters in the new book. On the book tour, Morris says at every event he meets at least one grandparent who’s raising their grandchildren, from owners of a big company to farmers, across the spectrum of society and in all regions of the country. The writer, who read from his novel “Long Way Home” and signed books last (Friday) night in Iowa City, says the book’s not exactly autobiographical. His grandparents did play an important role in his life, with a sense of stability and “place” at their home that he still carries.