"Humorously entertaining. . . subtly thought-provoking. . . Pratchett's Discworld books are filled with humor and magic." --Chicago Tribune "Think J.R.R. Tolkien with a sharper, more satiric edge." --Houston Chronicle The thirteenth novel in the Discworld series from New York Times bestselling author Sir Terry Pratchett. Lost in the chill deeps of space between the galaxies, it...