I just read this book and loved it. I think this is one of the first books by a female author that I actually finished. That’s pretty sad. It is about a girl whose dead aunt sends here on a scavenger hunt of sorts to find herself and find out what made her aunt tick. It exists in, as the title suggests, thirteen blue envelopes. These envelopes can only be opened when the task in the previous envelope has been completed. They send her on a trip through Europe on her own. It made me want to get a plane right now.