Marvin Kaye has crafted a wondeful sequel to Charles Dickens' "A Christmas Carol," picking up the story of Ebenezer Scrooge and revisiting familiar characters such as Jacob Marley, Bob Cratchit, and many others, following it through to an altogether satisfying conclusion in an intricate tapestry of the real and the supernatural, as the reformed Scrooge tries to satisfy a nagging feeling of something yet undone. ". . . intriguing and unusual. It's...