Who's stealing the Oreos?

By looking at the cover, you can tell that Slob by Ellen Potter might have something to do with Oreos.  You'd be right, but there's much more to the story.  Owen is twelve; he's almost a genius, and he's definitely a brilliant inventor.  He's also now the fattest kid in school, and you gradually learn that something happened a couple of years ago that was so awful, he started to overeat as a way to cope.  He lives with his sister Caitlin, who's joined the group GWAB (Girls Who Are Boys) and now wants to be called Jeremy, and his mom.  While dealing with both an incredibly cruel P.E. teacher and Mason Rigg, the school bully, Owen is working on two inventions: one will nab the person who's been stealing the Oreos out of his lunch, and the other, with the help of a TV, will help him see that terrible event from the past.  This is a great example of realistic fiction - some of it is funny, some of it is heartbreaking, but it's all authentic.