A Tangle of Magic by Valija Zinck
Penelope lives with her mother - her father died years ago. She has always been different from other children: for example, her hair has been grey since she was born. But one day, Penelope wakes up with sparkling red hair and her mother confesses the truth: her father is not only still alive, he's a wizard. Penelope has inherited his powers, and embarks on a journey to find him ...