SOLVED. YA dystopian/ post apocalyptic book about girl escaping to nuclear bunker. [s]

[Megan]

Its a fairly new book, probably only 5 or so years old. The novel begins by a teenage girl coming home from school to her dad telling her she needs to escape Because something bad happened ( I don't remember what). He gives her a map to a nuclear storage facility to use as a bunker to stay safe. On her way she ends up picking up 3 other teenagers and they make it to the bunker. She keeps a journal and they end up creating a new society, and they refer to her as "the great IAM"

[SBC]

I haven't read it, but is it Sara Grant's Half Lives?

[Megan]

Yes!!! Thank you!

[SBC]

Great! I've heard about this one before - it sounds interesting :)