Visitors from Oz: The Wild Adventures of Dorothy, the Scarecrow, and the Tin Woodman is a 1998 Oz novel by Martin Gardner, illustrated by Ted Enik.
In his story (which occurs after the action of L. Frank Baum's last Oz book, Glinda of Oz), Gardner employs the type of mathematics puzzle for which he was famous to bring Dorothy Gale, the Scarecrow, and the Tin Woodman to the United States in 1998. Dorothy becomes involved in the manipulations of two movie producers.
Gardner exploits references to aspects of contemporary American society, including Rudy Giuliani, the Internet, and television newscasts, to create a fiction that is very different in atmosphere from Baum's originals. Gardner's book also encompasses the ancient Greek gods, characters from Lewis Carroll's Alice in Wonderland and Through the Looking Glass, and an ursine detective called Sheerluck Brown.
Visitors from Oz should not be confused with the similarly-titled but very different The Visitors from Oz (1960), which adapts original material by Baum.