Everything you need to understand or teach Don't Let Go by Harlan Coben.
In Don’t Let Go by Harlan Coben, the murder of a former classmate reignites Detective Napoleon “Nap” Dumas’ search for the truth about the death of his twin brother, Leo. Leo and his girlfriend, Diana, were hit by a train 15 years prior. Their deaths were ruled accidental. What Dumas uncovers proves that the deaths were anything but accidental. Themes in the novel include morality, justice, and truth.