Adam and Emma return in Adam Undercover, The Consortium Directive. The two friends have become the youngest secret agents in the Arcanum Trivindico.  Having just survived their first dangerous undercover mission (not to mention the grueling schoolwork their teacher makes them do), they are enjoying a nice summer vacation.  Adam isn’t complaining about the break that he has been given, but near the end of it he starts to get really bored, which is why he is so excited to get the letter marking the start of his “private school.” 

Adam has just finished the best school year of his lifetime. He has saved the world and has become a secret agent. Unfortunately, his parents do not and cannot know about what he has done.