Johnny McSneed Writes a Book at Top Speed - Johnny McSneed series, #3

Johnny is feeling bored in the school holidays and decides to write a book by the end of the day.  His impolite cousins tell him that he's too young to write books and try to distract him from his goal.  Johnny is determined that his voice will be heard but can he write a book in just one day?  And even if he can, will anyone want to read it?