Everything you need to understand or teach Killing Moon by Jo Nesbo.
In the thriller Killing Moon by Jo Nesbø, the 13th installment in the Harry Hole series, a killer demonstrates that revenge is a dish best served with parasites. To get revenge on his abusive stepfather, a murderer bioengineers a parasite to facilitate his crimes. Famed investigator Harry Hole agrees to work as a private investigator on the case in hopes of righting past wrongs. Themes in the novel include revenge, underestimation of those deemed worthless, and parasites as a weapon.