Seaver, Kirsten A. The Last Vikings: The Epic Story of the Great Norse Voyagers. London: I. B. Tauris, 2010: is a balanced and inexpensive narrative of the rise and fall of the Norse Greenlandic settlements, with one or two chapters on the possible Norse exploration of New World, though I'm hesitate to some of her hypothesis on the end of the settlement in the 15th century in the last few chapters.