Ulysses Paxton is a captain in the American Expeditionary Force in 1918. During an artillery attack on the western front Ulysses body is torn in two. Instead of dying he is mysteriously transported to Mars just like John Carter. He ends up in the compound of Ras Thavas.
Ras Thavas is the most brilliant scientist on Mars. He is also completely amoral. He spends a lot of time transplanting brains from humans to animals and vise versa. He has a lucrative side business of transplanting brains from old and damaged bodies into young and health ones. One such victim is Valla Dias.
Ulysses becomes Ras Thavas’s assistant and learns his secrets. While in his employ he strikes up a friend ship with Valla Dia. The friendship soon turns to love and Ulysses vows to return her young body back to her. That body now belongs to Xaxa the Jeddara of the powerful city of Phundahl. Now Ulysses must escape from Ras Thavas, infiltrate Phundahl and bring back Xaxa alive to perform the surgery.
The sixth book in the Martian series is another exciting book. It has excitement, romance and adventure that you would expect in a Burrough’s story.