In this picture book, a boy writes a letter to an imagined alien, explaining all the things he will need to know about Earth and the people who live here--and adding a postscript asking what the alien might look like.

To save his father, a Coalition scientist protecting a precious resource, after their ship is attacked, Leo stows away on a strange ship of mercenary space pirates and must decide who to trust--human or alien--to stay alive. When scientists discover a rare and mysterious mineral buried in the Earth's crust, it's not long before aliens show up to our little corner of the galaxy offering a promise of protection, some fabulous new technology, and entry...

As Naomi and her fellow teen astronauts investigate the fate of their predecessors on the Europa colony, back on a deteriorating Earth, Leo works with a renegade scientist to warn the crew about hostile extraterrestrials. Leaving Earth behind is hard, but what's ahead, on Europa, could be worse. The International Space Training Camp continues to hide the truth about what happened to the last group of astronauts who attempted a similar colonization...