Spy School Revolution

Spy School Revolution by Stuart Gibbs

Erica Hale attempts blows up a room in CIA headquarters. The Spy School kids are torn in their loyalties, with one thinking she has gone bad, while others thinking there is some reason for the actions. They end up tracing some secret code from George Washington. This leads them to the secret "Croatoan" group that is plotting to overthrow the US and return the land to Spain. The Spy School kids discover a plot to destroy many leaders by hiding in a sculpture on the roof of the art museum. There is some chaotic action before the manage to succeed. The Spy School series seems to be running on fumes. The scenarios are getting more bizarre and less plausible (in a series that never relied much of plausibility.)