I have a complaint – Japanese Children’s book

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My up and down journey to learn Japanese continues. Reading remains one of the most difficult aspects of me learning Japanese, so I try to find material to read as often as I can. The problem is that I struggle to remain interested in what I am reading if it’s not interesting, but I think I have found a series of books from a Japanese author named Yoshitake Shinsuke that will keep me reading at my level for a long time.
I have a complaint - Japanese Children's book review