The Passage (a link to the audiobook, the book comes out in June) starts off as an almost character piece about a small girl named Amy. Then enters the FBI man, Brad Wolgast, and a number of death row convicts, combined with secret government experiments, to culminate in the ultimate post apocalyptic book. It has been understandably likened to Stephen King's The Stand, but I believe that Cronin's writing is more akin to Cormac McCarthy in the way he weaves people and scenery together, or even Bram Stoker in the way he uses first person, third person and diary writing. Whatever people decide they want to compare him to, I will be waiting breathlessly for more Justin Cronin!
Link: About The Book « The Passage by Justin Cronin