I didn't overly enjoy it and I also didn't overly dislike it. I actually couldn't stop thinking about how it reminded me of a Series of Unfortunate Events. I feel both have similar writing tones, although I haven't re-read a Series of Unfortunate Events as an adult. I enjoyed the mystery elements, and I enjoyed the sibling dynamics. I think what I didn't enjoy was the multi-verse elements. I found it very confusing to follow. This added a sci-fi element to the book and that just doesn't often appeal to me. The book felt very fall-like so it was a fitting seasonal read. I pictured dreary grey skies and no leaves on the trees. Even the cover reminds me of Fall weather.

As a Youth Librarian I will recommend this to young readers who are interested in mysteries and can handle a book that is intricately plotted. There is a lot to unpack in this books - kidnapping, secret rooms and the multi-verse. Plus that cliff hanger ending will keep young readers who are enjoying it hooked and wanting to read book #2 immediately. Not to mention that Haddix has an extensive backlist so she is a great author to dive into for a reader looking for something new.