On... the Elevator by Angela Hunt

Yet again Angela Hunt does not fail to captivate. She can take a seemingly fragile premise and turn it into a captivating book. At certain points I could not pull myself away from the book because I couldn't wait to find out what happened next and how things would be resolved. She even surprised me with a twist at the end. I won't say anything about it because that wouldn't be fair for those who have yet to read the book. :D