Margaret Clark 
Big Chocolate Bar [EPUB ebook] 

A brilliantly funny novel by the author of Ghost on Toast and Hold My Hand — Or Else!, for kids who are sick and tired of health food.All junk food is banned from the school camp. So Spoonhead, Amy Yui, Trash, Zits and some of the others think up outrageous ways of getting round the authorities. But their ingenuity results in a thriving black market with drinks going up to twenty dollars a can!