It depends on the context of the novel. If it's a tragic or complex story, the girl might be metaphorically 'in pieces' due to emotional turmoil, like heartbreak, loss, or some form of inner conflict. For example, in a story about a girl who has lost her family and is struggling to find her place in the world, she could be seen as 'in pieces' as her life has been shattered into fragments.
I'm not entirely sure as I haven't read it specifically. But from the title, it might be about a girl who is somehow broken or in a fragmented state, perhaps emotionally or physically.
Yes, 'Girl in Pieces' is based on a true story. It often draws from real - life experiences of those dealing with mental health issues, self - harm, and the journey towards recovery.
Since I don't know the specific story, it's hard to say exactly who the main character is. But based on the title, it's likely to be a girl who is in a fragmented state of some sort.