As a gifted kid who was reading way above my reading level way early in life, and then hit finished high-school and became functionally illiterate, this book is important as the book that got me back into reading. Chapters are bite sized so as to avoid being overwhelming, language is accessible and easy to understand, the characters are compelling and the magic is Fun.
I generally go for high fantasy more than contemporary fantasy, but when that was out of reach this book was the key to a world I thought I'd lost forever.