"It's Halloween night, and all the kids are dressed in scary and funny costumes. Their trick-or-treat bags are getting heavier. Nate the Great's good friend Rosamond isn't eating any of her treats. She's sad--and needs Nate's help. Her cat Little Hex is missing. Little Hex hates Halloween, so maybe he's hiding. Or is he lost? Nate and his trusty dog, Sludge, take the case and hunt in the night for Little Hex. They pass robots, pirates, and witches....

Chief Inspector Albert the duck and his three detective assistants follow a series of clues to find the batch of pumpkins stolen from the town pumpkin patch.

"A young detective is determined to uncover which of the Santas she sees in the big city is the one and only Santa Claus"--Verso page.