Per eNotes policy, I have edited the two questions down to one: How does the author create suspense in the story?
Suspense in The Lovely Bones is portrayed in an unusual way. What would be the most suspenseful moment in most books with a similar theme, Susie's murder, actually takes place in the beginning of The Lovely Bones. The reader is told in the first paragraph that Susie is a murder victim. This fact is never in question.
Suspense comes from several other sources, most notably Mr. Harvey. The Salmon family doesn't know at first that Mr. Harvey is the murderer, and later they strongly suspect him but cannot prove his guilt. They must live near him; see him every day. This creates a suspenseful atmosphere that climaxes when Lindsey breaks into his house looking for evidence. The reader fears for Susie's sister, because she doesn't know how evil he is.
Every time Mr. Harvey is near another person, the reader fears for that person's safety because we know his true nature and they do not.