Moon! Earth’s Best Friend by Stacy McAnulty, illustrated by Stevie Lewis, continues her rollicking, educational series on various planets. Full of fascinating facts--did you know the moon was formed from crash trash after a meteorite hit earth? They're cousins! Other moons in the solar system get their due. The tides that are pulled twice a day due to the moon's gravity remind us it is always there, even when we can't see it. There is a detailed appendix full of information about our best friend in the sky.