David Lawrence & Cherie Dignam 
Ruby and the Pen [EPUB ebook] 

Ruby and the Pen is the story of a 12-year-old, cartoon-drawing girl who buys a pen from a mysterious stall at the local market. She soon learns that the pen has a magical power. Initially the pen protects Ruby from the meanest girls at her new school, but over time the pen’s power becomes dangerous, leaving Ruby facing a whole new set of problems.