At the middle school if you don't know what to read you can take a tumble through the genre jars. Just pull out a slip and go get the book it recommends!
At the high school try the fortune teller. It will suggest a genre, a type of book or resource, or something random (like a book that starts with S).
If you're still stumped, ask Ms Muller, Ms Kerber, Ms Hueg, or Ms Olson for help!