This is a list of characters in the original sequel Oz books by L. Frank Baum's successors.
After Baum's death in 1919, publisher Reilly & Lee continued to produce annual Oz books, passing on the role of Royal Historian. Ruth Plumly Thompson took up the task in 1921, and wrote nineteen Oz books yearly through 1939. After Thompson, Reilly & Lee published seven more books in the series: three by John R. Neill, two by Jack Snow, one by Rachel R. Cosgrove, and a final book by Eloise Jarvis McGraw and Lauren Lynn McGraw. The books in Reilly & Lee's Oz series are called "the Famous Forty" by fans, and are considered the canonical Oz texts.[1]