This book by Cate Whittle was particularly good at the start. The author strictly adhered to cause and effect, which I enjoyed.
A year 4 reader would enjoy it. I suppose it is about 8000 words, at a guess. The story is about a new kid at school who doesn’t believe in dragons, which results in the protagonist’s dragon beginning to fade away. The punchline is Believe in Yourself. I think the last quarter of the book needed attention from an editor.
It may have been a CBCA notable in 2018.