First I don't know anything about this book. I planned to read this because I love her Winner Trilogy and I am currently waiting for the third book - the conclusion.

Back to the book, I only thought that she is just trying to regain her memory, nothing unusual... or paranormal. And I only thought that her hand disappearing is just an illusion or a hallucination but when Conn cuffed her and she was on fire, literally. That's the time I don't know what is really going on. And then she disappeared.

It turned out that she's a Shade (invisible, but visible SHADOW). The Shades are responsible for the Great Chicago Fire. And on the alternate world (wherein the Fire didn't happen) she's imprisoned by the IBI and is asked to spy inside the Society.

The book is a great read but the ending is still open for another book especially since

Spoiler

the antagonistic Shades are still lurking in the alternate world

.