Book excerpt: When Sophie receives a parcel from her best friend, Freya, she expects it to contain the reason why Freya left town so suddenly, without goodbyes and without explanation. Instead, she finds a letter addressed to Win, a girl Freya barely knew – or did she? As more letters arrive for more people on the periphery of Freya's life, Sophie and Win begin to piece together who Freya was and why she left. Sometimes it's not about who's gone, but about who they leave behind...