What Goes Up Must Come Down

The eighteenth book in this popular series! Abby is ecstatic about her family's plans for a vacation in Paris. But when they get there, it's more of the same old her siblings fighting non-stop, with nobody able to agree on so much as where to eat dinner. Abby feels a connection to the city, though -- after all, it's the home of many famous writers. So she decides to take matters into her own hands...and go off on an adventure of her own.