It takes place on Halloween night. There are witches in it, possibly a family of them. There are (5?) cats each with a hex at the end. The closest I can come to it is Nate the Great Halloween, but that is not it.
Beginning readers are introduced to the detective mystery genre in these chapter books. Perfect for the Common Core, kids can problem-solve with Nate, using logical thinking to solve mysteries!   It is Halloween night, and all the kids are dressed up to go trick-or-treating. But Nate's friend Rosamond needs his help. Her cat Little Hex is missing. Is he hiding, or is   Beginning readers are introduced to the detective mystery genre in these chapter books. Perfect for the Common Core, kids can problem-solve with Nate, using logical thinking to solve mysteries!   It is Halloween night, and all the kids are dressed up to go trick-or-treating. But Nate's friend Rosamond needs his help. Her cat Little Hex is missing. Is he hiding, or is he lost? Nate and his trusty dog, Sludge, are on the case! Check out the Fun Activities section in the back of the book! Visit Nate the Great and Sludge!NatetheGreatBooks.com“All the regulars are back in Nate's latest mystery, and as fresh as ever. Sharmat makes beginning reading a pleasure.”--School Library Journal ...more