"Baron Livingstone and the King of Manhattan" is a time-travel story with a difference. It's a journey to a parallel universe, undertaken by two New Yorkers. Firmly rooted in science, it also explores several questions relating to our place in the universe, to the afterlife, and to the Divine. The novel is an imagining of Vinland, the territory that could have developed had Leif Erikson, the Viking, and his people chosen to remain in the America they...