The Thanksgiving Mystery is a children's book written by Gail Herman and illustrated by Duendes del Sur. It was first published in 2006.
Description[]
Scooby-Doo is America's favorite canine super sleuth!
Something Spooky's going on! The gang heads to a farm to pick vegetables for Thanksgiving dinner, but - ZOINKS! - it seems like Daphne, Velma, and Fred have been turned into pumpkinhead monsters! Can Scooby and Shaggy get to the bottom of this caper before the pumpkin heads get them?