Zack Delacruz: Me and My Big Mouth (Zack Delacruz, Book 1), Paperback

Zack Delacruz is unnoticed at his middle school - and that's just the way he likes it. But a school assembly, a typhoon of spit and an uncharacteristic moment of bravery are all it takes to change everything. Suddenly, Zack is in charge of the class fundraiser. Worse, his partner is the school's biggest bully! If they don't sell all the chocolate bars, there will be no dance for the sixth grade. Zack never wanted to be a hero, but with his classmates' hopes on the line, can he save the day?