The Unbreakable Code
Mr. Quisling is up to something mysterious, and Emily and James are on high alert. First, there's the coded note he drops at a book event. Then they uncover a trail of encrypted messages in Mark Twain books hidden through Book Scavenger. What's most suspicious is that each hidden book triggers a fire.
Publication Date: 25-Apr-2017
Publisher: Henry\\Holt#& Company