Adam Chase & Ivar Jorgensen 
Quest of the Golden Ape [PDF ebook] 

Fans of classic golden-era science fiction or readers who enjoyed Edgar Rice Burroughs’ John Carter series will go bananas for this short novel from Ivar Jorgensen (pen name of Randall Garrett). A lone man finds himself totally cut off from civilization and everything he’s ever known. Just as he starts to get his bearings in this unfamiliar world, a whole new level of terror unfolds.