The Mars Project has 81 pages.
A Wizard of Mars has 560 pages.
Moving Mars has 448 pages.
Mars Life has 432 pages.
Destination Mars has 160 pages.
Marooned on Mars has 210 pages.
Return to Mars has 416 pages.
Swords of Mars has 315 pages.
The Chessmen of Mars has 375 pages.
Semper Mars has 376 pages.
Mars trilogy has 609 pages.
Rainbow Mars has 316 pages.
A Princess of Mars has 326 pages.