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.