Well, it really depends on the particular 'Wonder Boy' book. There are numerous books with that name in the world. However, if it is indeed based on a true story, it might be about a boy who has some extraordinary qualities or experiences. For example, he could be a child prodigy in a certain field like music or academics, or he might have gone through a difficult situation like poverty or an illness and still managed to shine. So, simply saying it's a book based on a true story is a bit broad without more context.
It's not a true story. Usually, such titles are part of the author's imagination or based on a fictional concept rather than real events. The characters and plot are crafted to engage and captivate the audience.
Wonder is not a true story. It's a work of fiction that aims to touch the hearts of readers through its engaging plot and characters. The author crafted it to bring out various emotions and lessons without being based on real events.