Calendar Mysteries #11: November Night

It''s a mystery every month from popular A to Z Mysteries author Ron Roy! With the younger siblings of the A to Z Mysteries kids!
November is for Night...
 
It''s November, and there''s a new mystery to solve. ''The twins'' new neighbors are up to something! It''s Thanksgiving, and a mysterious couple has moved in next door. Bradley, Brian, Nate, and Lucy must work out the clues: The neighbors have built a tall wooden fence. They''ve bought some strange parts for making . . . something. They''ve even put up a suspicious tent in their backyard, with a big, scary dog to guard it. What could they possibly be hiding?