Oscar Diggs, (aka the Wizard of Oz, Wizard, Oz) is a fictional character invented by L. Frank Baum, author and creator of the Oz legacy. Oscar is first introduced in Baum's first Oz book titled The Wonderful Wizard of Oz, published in 1900. However, despite the book being named after his title of position as the self proclaimed "Wizard", Oscar is not the focal point character. He is not brought into the plot until halfway through the tale when he meets and speaks with the child protagonist and heroine of the novel named Dorothy Gale.