The Dead Of The Night by John Marsden

Narrated by a teenage girl, this installment follows a small band of friends who, after their country is invaded, deepen their guerrilla campaign from a hidden farmhouse; as they carry out increasingly risky sabotage and ambushes against occupying forces, they confront the costs of violence and the erosion of their innocence, testing loyalties, courage and the moral limits of survival in wartime.

Purchase from Bookshop.org