I’m delighted with this series–kids using magical objects to shrink down to a tiny size and visit other times and places via the Thorne Rooms in the Chicago Art Institute. This one was much the same as the others, except in this one, for the first time, the kids see consequences of mucking around in the past (like in Back to the Future.) If I had to criticize it would be to say one of the storylines seemed a bit contrived. I think I would have liked it better if the kids just went into a room, stepped back in time, and had an adventure. Instead, the adventures had to be tied to action in the present day. Still, this is a fun adventure, with lots of interesting history thrown in.