Journey to the Stone Country has 364 pages.
336 pages.
Journey to Mars has 543 pages.
Journey to Infinity has 381 pages.
Journey to Venus has 499 pages.
Journey into the Whirlwind has 418 pages.
Journey to Ixtlan has 268 pages.
Journey to Jupiter has 159 pages.
Congo Journey has 464 pages.
Races of Stone has 192 pages.
A Song of Stone has 280 pages.
Solomon's Stone has 224 pages.
Chronicle in Stone has 280 pages.