Wrong book is wrong.
This is not how you deal with a bully. There's a kid named George who is being bullied by a sixth grader who is stealing his lunch because George doesn't have any money to give him. The bully demands various things like a bigger lunch, more cookies, and things like that. George is just getting more and more paranoid about being bullied, and then his friend Harriet asks him what's wrong and he explains. She suggests that they should tell the principal, but he says that won't work because the bully doesn't go to the same school. So the kids themselves come up with a solution to the problem, instead of going to an adult, which is what you really need to do in this situation. They make a really bad-tasting lunch with hot peppers, lard, vinegar, and garlic powder, and then the bully steals George's disgusting lunch. That apparently somehow fixes the problem, although Harriet's older cousin follows George to school for a week.
That would just make the bully mad. The bully would be angry at you having done that to him, and probably take revenge as soon as that week was over. That's not how you deal with a problem like that. You really need to get somebody involved. First you tell the bully to stop, and if they don't stop, then you get an adult involved. You don't want to end up in a situation where the bully is actually violent with you. There are only threats in this story, but kids aren't going to come up with the solution to bullying on their own. This whole book is a bad idea. Don't do this.