Again, I appreciate the historical accuracy here. The togas and sandals for Jack and Annie were accurate, as were the descriptions of the shops on the streets and the baths. This might be a very fun way for my students, who have just spent a few months learning about ancient Rome, to get a more first-hand view of it.
The one thing I noticed that wasn't QUITE accurate (and even my students should be able to recognize this, so I'm not worried about leaving this in the classroom library to read) was the description of the eruption.
I think they'd also enjoy the ending and finding out who it was that rescued Jack and Annie at the end.