Dipper Pines offers tips on investigating the unexplained, while his twin sister Mabel comments on his suggestions and provides her own quizzes and ideas for having fun, along with additional contributions from the other people of Gravity Falls

"Charlie Brown, Snoopy, and his friends are playing astronauts! Space exploration is all fun and games … until the Cat Next Door begins to stir up trouble! What will the World-Famous Astronaut do? This collection of graphic novel short stories includes the classic graphic novel The Beagle Has Landed, Charlie Brown and is perfect for Peanuts fans across the galaxy." --