Travel to deep space and back again with The Mars Challenge, a nonfiction graphic novel for teens about the science and logistics of a manned mission to Mars.Nadia is a teen with a dream: to be the first woman on Mars. But to get there, she's got to learn all she can about the science of spaceflight. It's a good thing her friend Eleanor is an Attitude Determination and Control Officer—basically, she pilots the International Space Station!Eleanor ta...