Grant's use of dialogue enables the reader to be placed in Vanya's shoes. It also adds to the story by peaking the reader's interest. Every time Vanya is interrogated by his officers about why he is a Christian, he always relies on God to give him strength to supply honest answers. As the plot develops, Grant shows the effect that Vanya has on the atheists surrounding him. One of the interrigating officers becomes extremely agitated because Vanya causes him question his own befliefs.
Authors have a way of adding a bit of surprise to their books to keep the reader interested.
One way in particular that Grant keeps the interest level up is by including Vanya's experiences with angels. When the reader thinks things can not get any worse for him, angels are right there beside him. I wish to show you the heavenly city. The unexpected arrival of angels added another dimension to the story of Vanya. Another technique that Grant uses to surprise the reader is the element of flashback.