Since I haven't found it for years, it's clear I'm not able to describe it as vividly as I could before. I only know a couple things about this book, which is most likely my problem.
I know that the main character is an alien girl. She escapes from what I remember to be a plane hangar, one she's apparently been hidden away in for years. This is detailed in the first chapter of the book. I don't know the girl's name, but I sort of remember it starting with a "P." One thing that is very clear in my mind about this book is that it had fairly bad grammar when I read the first chapter. Some words were capitalized when they weren't supposed to be, periods were misplaced, details like that. I also distinctly remember it being written by a British author, but I'm not exactly sure what the name was.
I'd really like to try fully reading this book, because it did have a slightly compelling plot. It would be really nice to get help in finding it again. When I read the first chapter, the year was 2015, but the book was definitely written before that time. Please help me find it, it would be greatly appreciated.