Jilly McPeak is a geek chic middle-schooler with a penchant for all things science. Well, she's a little more geek than chic, but that's to be expected for a girl who carries home the bones from her owl pellet dissection in her lunchbox.In her Fabulously Disgusting adventure, Jilly is determined to win the school science fair because this year offers the best-ever grand prize. Things threaten to go off track, though, as a school-wide germ crisis hits Cedar Brook Middle School. Together with her best friend and lab assistant, Josh, she must work to save the science fair and get to the bottom of what is making everyone barf-tastically sick. Jilly enlists Josh's help to get to the bottom of what-or who-is behind the crazy pathogen outbreak. Could it be Squeaky McPherson, the janitor everyone suspects of hoarding old ketchup packets from the cafeteria floor? Or is it nosy Steph Steepleton who happens to have the messiest desk in the galaxy?Jilly has to get to the bottom of the mystery plaguing her school before the entire science fair is ruined. Her outrageous experiments and her adventures with Josh eventually point them to the culprit behind the nasty germ uprising.Amid funny experiments and a basement full of Petri dishes, Jilly shows everyone that girls and science go together like chemicals and compounds