John Carter of Mars - Volume 3 - Chessmen of Mars & Mastermind of Mars. A freak storm on Mars throws Tara, Princess of Helium and beautiful daughter of John Carter, wildly off course after she embarks on an imprudent flight. Gahan, Jed of Gathol, her new admirer, takes off in pursuit and they soon find themselves in a land of bodies without heads and heads without bodies. In Chessmen of Mars, Edgar Rice Burroughs once again whirls the reader into an entertaining maelstrom of breakneck action. The second novel in this book, Mastermind of Mars, introduces us to Ulysses Paxton. Whisked from the battlefields of the Great War to Mars, Ulysses is pitched into a nightmare world of brain and body transference underpinned by the high adventure we expect from the John Carter of Mars books. Burroughs fans will not be disappointed by this third volume in Leonaur's ongoing series.