Hello, Noddy.
In answer to the part of the question in your thread title:
The Magic Pudding was a much-loved Oz childrens' yarn when I was growing up. I'm not sure if it's as popular these days, though. Norman Lindsay (the author) is a well-known Oz artist, also famous for erotic drawings of women & cats. (He was a great lover of women & cats!

)
I'm not familiar with the other titles you mention, but then I was probably in the process of familiarizing myself with the English language (& reading lots of Enid Blyton!) when other children my age were reading them.
I'll bet others Oz A2Kers will be able to tell you more, though.