Mason & Dixon might be Thomas Pynchon's most human book. Its main characters are richly drawn, and they center the narrative. Yet the novel is also packed with historical allusions and an eighteenth-century vernacular that some readers may find difficult to navigate. A "Mason & Dixon" Companion offers this navigation line by line, unpacking Pynchon's puns, his many references, and his pet themes. Brett Biebel provides a contextual...