This book was pretty creative. It is about 2 friends, Jack and Ruthie, who discover a key while on a field trip to see the Thorne Rooms at The Art Institute of Chicago.(I didn't realize until the end that this is a real exhibit. Check them out.) When Ruthie picks up the key, it gets warm in her hand and she begins to shrink. Fascinated by the rooms, she and Jack find a way to explore the Thorne Rooms in a quest to discover any other magic the rooms might hold.
This was a cute story. It wasn't really emotionally intense in any areas. I think kids from about 7-10 would like it most.
This was a re-read for me, but it had been a very long time. I remember feeling emotional while reading this book the first time. Rereading it now as an adult made me wonder how old I was the first time I read it. What a great book!