The Voices of Silence by Bel Mooney

A gripping story about a young girl's turmoil during the revolution in Romania.
Before she knows it, everything in thirteen-year-old Flora Popescu's life has changed. Her parents, her best friend Alys, and the restricted life she has always known in their Bucharest tower block are distanced from her - and Daniel, the mysterious new boy at school, seems to be the cause. Flora likes him, but why can't everybody else trust him too? She thinks of her father's words: "People like us can't afford the luxury of new friends." Then, just as she is making sense of her divided loyalties, Flora discovers that only she alone can save her father's life.