"Ever since Amp crash-landed his spaceship through Zack McGee's bedroom window, Zack's life has gotten crazier and his grades have gone from bad to worse. Who has time for homework when there's an alien invasion to stop? But now Zack's up against his greatest challenge yet-- the school science fair. If Zack doesn't get an A on his project, he's going to flunk the class."--Jacket.