Everyone Brave is Forgiven by Chris Cleave

Mary North is dedicated patriot, and when war is declared she makes the informed decision to forego school and instead sign up at the War Office and offer her services to the country. On the other hand, Tom Shaw decides he would rather not enlist, that is until his flatmate, Alistair, unexpectedly decides to enlist. During her service to her country, Mary proves that is a great spy. She is suddenly made into a teacher and finds herself confronting prejudice to protect children. When Tom and Alistair meet Mary, Tom is willing to do anything for her and Alistair falls in love with her. The story goes into the ways their love for one another is tested during war particularly while they are surrounded by violence. Passion, friendship and deception also play a major role in shaping their hopes and dreams.