Princess Dangerous written by Alan Grant and his Granddaughter Abby Gray illustrated by Shalla Gray (Allan's daughter and Abby's mother) from Curlytale books
Life around Castle Humungous is boring for Princess Pistachio and her pesky siblings are always getting in her way – the only solution: put on her trusty tartan scarf, grab her disgruntled cat and fight bad guys! However, when her baby brother is captured by the evil King Villy, it falls to her to rescue Baby Cashew and save the Kingdom of Yotupia (enlisting the help of her sister Pieface first, of course)!
This is a nice little book aimed to children aged 9-12 years old simple story but engaging my niece sat and read it in one sitting and enjoyed it all the way through