Book excerpt: 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 takes Nadia on a conceptual journey through an entire crewed mission to Mars, and explains every challenge that must be overcome along the way; from escaping Earth's gravity well, to keeping the crew healthy as they travel through deep space, to setting up a Mars base, to having enough fuel for the trip home! In The Mars Challenge, writer Benjamin A. Wilgus and artist Wyeth Yates bring the reader on a thrilling interplanetary voyage and clearly illustrate the scientific concepts and complex machinery involved. Humans can reach Mars in our lifetime—this book explains how it can be done.