Invisible Inzi of Oz is an Oz book by Virginia and Robert Wauchope, who were fourteen and nine years old, respectively, when they wrote it in 1919, supposedly channeled to them from a Ouija board. It was first serialized in the periodical A Child's Garden from 1925 to 1926, reprinted in the Winter 1980 and Summer 1981 issues of The Baum Bugle, and republished in book form by Buckethead Enterprises of Oz in 1993, with illustrations by Eric Shanower.