The Terrorist is a 1997 young adult novel by Caroline B. Cooney.

It deals with Laura Williams, a sixteen-year-old American who attends an international school in London.

When her younger brother, Billy, is killed by a terrorist bomb handed to him by a stranger on the subway, Laura becomes obsessed with revenge.

She suspects everyone, including her classmates, and wonders about their associations with such causes as the PLO or the IRA.

The situation is complicated when an Iranian classmate named Jehran asks Laura to give her Billy's passport to help her escape an arranged marriage.