I have to warn you, if you are looking for one of Julia Donaldson's normal works, her witty rhyming stories with the poetic touch, this is not the book for you. It is a very girly book, with lots of sparkly glitter and lots of pink. That is actually very appealing to little girls. However, It doesn't rhyme. If you are willing to keep an open mind and don't mind a very different style of writing compared to the other Julia Donaldson books, then go ahead and buy this book.
I have a pair of twins, a boy and a girl. My boy was curious about all the glitter, but the pink colour scheme and overall girliness didn't attract him. But my girl loved it! She liked the story and the illustrations and of course all the glitter. I personally like this book too. I think it's different, a good different. The story is about a princess who was kidnapped by a wizard on her birthday (after her fairy god mother managed to give her ten chances to escape from the wizard by changing her shape and size). She changes into different animals - a blue fish, a yellow chick, a green grasshopper, an orange fox among others in her attempts to escape. This is what I like about the story. It teaches colours and different animals.
So I would recommend buying it. I agree, Julia Donaldson's rhyming stories are really witty and beautifully written, but sometimes it's fun reading a book by her that is still beautifully written but from a whole different angle.