Menacing Manor

Book four in the tragic series about the Sinister-Winterbottom twins, who must solve one wretched mystery after the next, brought to you by #1 After escaping from Edgarent and Dr. Jay, the Sinister-Winterbottoms and their friends arrive at Stein Manor Science Camp. They all work together to distract the friendly teenage camp director so they can explore and look for clues about where their parents might be.Meanwhile, Theo and Alexander settle on a daring plan. They know exactly where Edgarent is going to be: coming for them, and the books. This time, theyll be ready. This time, theyll get answers. And this time, they wont trust the adult in charge, which is easy enough when its enormous, lurking, unfriendly Mr. Frank. But as they get closer to opening the books and their parents histories, an unexpected foe is watching everything they do. . . .Fake volcanoes! Real sea caves! Strangely modified frogs! Startling betrayal! And a lightning-struck manor! all combine for the electrifying penultimate Sinister Summer adventure.