Nothing exciting ever happens to Ruthie until the day her class visits the Art Institute of Chicago and sees the Thorne Rooms for the first time. The Thorne Rooms are a collection of sixty-eight exquiste and realistic miniature rooms, each designed in the style of a different time and place. Ruthie can't believe how wonderful these rooms are and wants to spend the entire class trip looking at the rooms. The rooms are so realistic that Ruthie thinks it would be wonderful to explore each room firsthand. The unthinkable happens when Ruthie's best friend Jack find a mysterious key which turns out to be magical.
The audiobook edition includes an interview with author, Marianne Malone.
I would recommend this book to readers in 3rd through 5th grade. Readers who have read and enjoyed The Mixed-Up Files of Mrs. Basil E. Frankweiler and Blue Balliet's mysteries will find The Sixty-Eight Rooms an exciting read.