Mystery of Mordach castle

This book is about to kids who are great at solving mysteries and this one is their most frightning one ever. When I first started reading this book it started to remind me of Scooby but later on in this book it started to get complicated and the more you read the more you though about it. When not reading the book I would be trying to figure out the answer to the mystery. When learned what was really happening I was a little sad because my guess was way off but in all this bk was pretty cool.