In Back to the Stone Age, the fifth novel of Edgar Rice Burroughs' the Inner World series, we join Von Horst en route to the remote land of Lo-Har, a journey of hair raising exploits among savage beasts and strange people, until finally he reaches his destination and wins the love of the beautiful La-ja. In the second complete novel in this book, our returning hero David Innes is travelling across Pellucidar from Lo-har, where he encountered Von Horst, to the land of Sari. When crossing a river Innes and his band of Sarians are attacked by bearded female warriors-and so begins The Land of Terror, another helter-skelter adventure through the Inner World written in the inimitable style of a master storyteller.
Edgar Rice Burroughs was an American author, best known for his creation of the jungle hero Tarzan and the heroic John Carter, although he produced works in many genres.