"Northern Spy" is a novel by Flynn Berry. The story revolves around Tessa, a documentary filmmaker and mother living in Northern Ireland. Tessa's life takes a drastic turn when she discovers that her sister, Marian, has joined an extremist organization known as the IRA.
As Tessa tries to reconcile with this shocking revelation, she finds herself caught in the middle of a dangerous web of secrets, lies, and political intrigue. When Marian goes missing and is suspected of carrying out a terrorist act, Tessa becomes torn between her loyalty to her sister and her duty to her country.
Driven by love and a desire to protect her family, Tessa embarks on a quest to find Marian and bring her back from the brink of destruction. Along the way, she must navigate the treacherous landscape of divided loyalties, government surveillance, and the lasting scars of Northern Ireland's troubled past.