Now batting clean-up, book number four in a new early chapter book mystery series where each book is set in a different American ballpark! Houston, we have a problem! Before a game at the Astros' ballpark, Mike and Kate get to meet astronaut commander Nick Rice at the nearby Houston Space Center. He's planning to display a very rare moon rock at an autographing event later. But just before the event, a nefarious outlaw knocks out the commander and steals the moon rock! Can Mike and Kate figure out who did it...when their only clue is a broken green feather? The Astro Outlaw includes fun facts about the Houston Astros' stadium with trivia about the train on the outfield wall and the homerun gas pump. Cross Ron Roy's A to Z Mystery series with Matt Christopher's sports books and you get the Ballpark Mysteries: fun, puzzling whodunnits aimed at the younger brothers and sisters of John Feinstein's fans.