I need to begin and end any good thing (related to kid's books) with Julia Donaldson. Z LOVES Zog, and it is a part of Z's top 3 Julia Donaldson books. You can read the review of the book here.
Z loves Donaldson, dragons and school... hence Z is completely obsessed with the book. She reads the book every single day and within a week she has memorized the book already. She reads the book on her own throughout the day. My (our) favorite line in the book is "Don’t rescue me, I won’t go back to being a princess, And prancing round the palace in a silly frilly dress"