High Wizardry: The Third Book in the Young Wizards Series

Young wizards Nita and Kit face their most terrifying challenge yet: Nita's little sister, Dairine. Not only is Dairine far too smart for a ten-year-old, she also has recently become a wizard, and worse yet, a wizard with almost limitless power. When Dairine's computerized wizard's manual glibly sends her off on her novice adventure-her Ordeal-Kit and Nita end up chasing her across the galaxy, trying to catch up with Dairine before she gets into trouble so deep that not even her brains can ...