Charles is a children's picture book author. He has written a number of titles for Wild Dog Books across a range of series. These include Our Past: Convicts and Gold, the Extreme Weather series, the Going Supernova series, Butterflies, Horses and Honey Bees CloseUp, the Then & Now series and one-off titles Hunters & Hunted, Fantastic Facts, Gross Facts and The Book of the Sun and the Stars.