- Why is Rob the narrator? How would the story be different if Cassie narrated the events? Or Sam? Or even Rosalind? Or if it were a third person narrator?
- Do you trust Rob as a narrator? How do you know if he's being honest or if he's lying?
- Why does Rob turn against Cassie after they spend the night together? Would it have been possible for the two of them to remain friends after having sex?
- Is Rob a good detective?
- Should Rob have taken himself off the case? How would events have changed if he had?
- Guys, let's talk about the ending: Were you surprised by who killed Katy? Why do you think Rosalind really wanted her sister dead? Would it be possible to punish Rosalind? Will she do something like this again?
- What do you think happened to Jamie and Peter? Are you disappointed that crime was never solved? Do you think Rob has finally come to terms with the fact that his friends have disappeared, are probably dead, and he will never know who did it? Or will this always haunt him?