In the second part of the book, he is tracked down by a reporter who works out that he has been somewhat successful at saving people (and not taking the credit). The reporter then talks him into returning to the area he grew up in to try and work out what the source of the messages are (Ironheart is convinced they aren't from God).
The book isn't bad. It rattles along at a fair old pace (especially in the first half), but later on it slows down considerably and gets slightly less interesting at that stage. The denouement of the book really doesn't work I don't think and sort of kind of lets the rest of the story down.