How does the author use foreshadowing in What Dreams May Come: A Novel?

In Chapter 16, we come to see that Chris' connection with Ann is still too strong or that he just refuses to let go, and that Summerland is a strange blend of the Christian ideal of heaven and purgatory. That there are no mirrors to keep the residents from seeing their flaws argues that Summerland really is not Heaven. Chris's repeated dreams of losing Ann are foreshadowing, proving that his connection to her, and through her, to earth, still exists