The unbreakable code / Bertman, Jennifer Chambliss

"Mr. Quisling is definitely 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 Emily and James uncover a trail of encrypted messages in books by Mark Twain hidden through Book Scavenger. What is most suspicious is that each hidden book triggers an arson"--OCLC.

Emily and James must uncover the clues in the Mark Twain books hidden through Book Scavenger about the string of recent arson fires plaguing the city before the arsonist comes after them.

Could the Mark Twain books hidden through Book Scavenger contain clues about the string of recent arson fires plaguing the city?.