The good sister / Morgan Jones.

"If you had the chance to escape from your life and, better still, fight for a cause you believe in, would you take it? At seventeen, disenfranchized with her life in London, with a mother too sick to care for her and a father too broken to, Sofia Mounir packs her bags and heads to the only place that makes sense: Raqqa. A place where she can be part of something greater than herself. Where she can help build a new society from the ground up. But what happens when that world isn't everything you dreamed of? When you realize that other people's intentions might not be as pure as your own? And what happens when you're not allowed to leave alive?"--Publisher's description.