Kate and Henry can hardly it.Astronauts have landed on Mars! And their first discovery there? A thick glutinous substance that seems to be falling from the sky. A substance not unlike...pie filling? Could it be? Could it be raining pies on Mars? Suddenly, Mars seems a whole lot more inviting - and delicious! - than it ever has before. And more will be revealed. Because it just so happens that Grandpa has some very personal experience with these Martians. And, even more importantly, with the pies.