I Was A Sixth Grade Alien

All things must come to an end, even in sixth grade. But not all things end happily, and it looks as if Pleskit Meenom's year as a sixth grade alien is about to end in a catastrophe as Earth is swept by rumors that something horrible has happened at the alien embassy. Soon anti-alien demonstrations erupt outside Pleskit's school.
Who is behind the rumors? Is there really a secret enemy on the embassy staff? What happens if the mission fails?
When Pleskit disappears, those questions take on new urgency. Despreate to answer them, Pleskit's friends Tim Tompkins and Rafaella Cruz are forced to team up with Tim's old enemy, Jordan Lynch, to save the mission...and Earth!
When aliens come to Earth on an interplanetary trade mission, sixth-grader Tim makes friends with the ambassador's son and together they uncover a plot to sabotage the mission.