Even though I normally don't like this sort of books, I did want to read this book a few years ago. One of my friends read it and told me about it. And I got interested in the story.
Ginny gets a stack of letters from her deceased aunt urging her to make a tour around Europe, opening one letter at a time.
After reading I thought that the story was original but completely unbelievable. There are happening so many weird things but nobody seems to care about that. For one, what kind of parent would not object to this ridiculous scheme? Especially since she's not allowed to contact them. I enjoyed reading, it was an easy read.. You could read it rather fast, but I was not blown away by it. However I still bought her second book as well, but still need to read that one (after I think seven or eight years). I now saw there apparently is a sequel to this one, The Last Blue Envelope, but I don't think I'll go and read it.
Note: I read a Dutch translation of this book.