Killer Lunch Lady

AL'S WORLD DON'T EAT THE PUDDING! Something about the lunch lady at Al's school stinks, and it isn't just her cooking. She wants Al and Keith to keep an eye on their friend Beth. But every time Al reports Beth's whereabouts to the lunch lady, strange men show up with guns. What's Beth hiding? Why would anyone want to kill her? And what the heck does the lunch lady have to do with it?