These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Periphery Demographic: A lot of adults read her books, some of whom read them as children and still read them even now. It's not unheard of for parents or teachers to develop an interest in her books after seeing plenty of young girls read them, either.
Toy Ship: Most of Wilson's books have this in some form. With the exception of Kiss, Dustbin Baby, Love Lessons and the Girls series, all of her protagonists from Tracy Beaker onwards are under 13 years old.
What Do You Mean, It's for Kids?: Take a Good Look is about a partially sighted girl who decides to go out shopping alone even though she's not allowed, and is caught up in an armed robbery. It faced criticism when it came out for being aimed at 6 to 9-year-olds despite the disturbing descriptions of the heroine being threatened and violently attacked by people she can't see. This is probably the reason it isn't in print any more.