Savage Pellucidar

Savage Pellucidar is a 1963 fantasy story collection by American writer Edgar Rice Burroughs, the seventh and final book in his series about the fictional "hollow earth" land of Pellucidar. It was published twelve years after Burroughs's death.
Like a number of other posthumously published books by Burroughs, this book is not a novel but a collection of short stories. The first three stories, "The Return to Pellucidar", "Men of the Bronze Age" and "Tiger Girl", were published in the magazine" Amazing Stories "in February, March, and April 1942. The fourth story, "Savage Pellucidar", was published for the first time in November 1963 after being discovered in a safe by Burroughs' son Hulbert in the early 1960s.
Copyright.
The copyright for this story was renewed in the United States on 9 December 1991 by Edgar Rice Burroughs, Inc. (renewal reference number: RE0000570901). The copyright should therefore expire in the United States on 1 January 2059. The copyright for this story has expired in Australia, and thus now resides in the public domain there. The text is available via Project Gutenberg Australia.