Journey Through a Small Planet has 256 pages.
Diet for a Small Planet has 301 pages.
336 pages.
Journey to Venus has 499 pages.
Journey to Ixtlan has 268 pages.
Journey into the Whirlwind has 418 pages.
Journey to Infinity has 381 pages.
Congo Journey has 464 pages.
Journey to Jupiter has 159 pages.
Journey to Mars has 543 pages.
Enrique's Journey by Sonia Nazario has around 300 pages in the paperback edition.
Journey to the River Sea has 298 pages.
A Journey in Other Worlds has 476 pages.