The word eater

Life is miserable for sixth grader Lerner Chanse at her new school, where the MPOOE (Most Powerful Ones On Earth) Club ruthlessly rules over the SLUGs (Sorry Losers Under Ground). It looks as if Lerner is destined to be a SLUG, until she finds a magical worm that eats printed words instead of dirt. If Fip eats a word, that item simply disappears from the world -- forever.