`In this, the Seven's first adventure together, Jack's adventure on a snowy night leads them to an old house, a deaf caretaker, and a thrilling mystery!' is the blurb of the first book of the Secret Seven series, and I like the part when one of the members forget one of the other members, as shown here: "Let's see--we want one for Pam, one for Colin, one for Jack, one for Barbara--who's the seventh of us? I've forgotten." The answer is George! The first mystery is about the old house opposite there own. There is a thief in there apart from the deaf old caretaker of the house!
As a first book in a series, this story is quite light and simple, but a lot of fun. It neatly paves the way for a series of similar but more involved stories to come. I would rate this book: 7/ 10.