Occasionally I enjoy nothing better than reading a big old doorstop of a novel. You know the sort of thing I mean. Big enough that you know your wrists are in danger of snapping if you try and read more than about 100 pages in a single sitting, The Passage falls into this category. With seven hundred and sixty-six pages all in, you can be sure that this story is epic in scope and promise. The book is split into two sections.  Part one tells the story of military genetic experimentation gone wrong. Seen primarily through the eyes of a world weary FBI agent, the reader learns of the US Army’s plans to create man made vampires (it’s ok they don’t sparkle…they glow). The Authorities end up getting more than they bargained for, and their worst fears are realised when the vampires escape. Cronin manages to generate a real sense of despair and loss here. All the main characters are broken in one way or another. Special Agent Brad Wolgast is haunted by the family he lost. Six year old Amy is left abandoned by her mother at the doors of a convent. The ending of this part of the…