As is often the case in young adult lit, A Mango-Shaped Space talks about what it's like to be a teenager from the perspective of a teen. To this end, Mia is misunderstood by everyone around her, she pulls pranks on people (a.k.a. PIC missions), and she keeps secrets from adults. See what we mean? Classic young adult behavior.
The book asks us to think about the experience of being a teen and what it's like to deal with homework, teachers, parents, best friends, and siblings, all while keeping a big secret. It's written for teens who are just like Mia, trying to figure out who they are and what they want to be, one prank at a time.