Even though the novel is told from so many different perspectives, there is a central plot line around Sully, a recent widower who feels the need to disprove the validity of the calls. His personal journey is the one that ties many of the other characters together, and his quest to get to the bottom of the calls drives the story along. The ending to his portion of the tale does have a unique twist, and the spiritual message it conveys is fluid enough that each reader is going to be able to interpret it slightly differently. THAT is what makes a great Christian-based novel for me. Albom isn't telling you what to believe, but puts a lot of different perspectives on the table and leaves it up to you to place additional meaning behind them.