Menacing manor
(Book)

Twins Theo and Alexander, their older sister Wil, and five new friends find themselves at an electrifying manor run by Mister Frank and Dr. Stein.

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. Theo and Alexander know exactly where Edgaren't is going to come for them and the books. This time, they'll be ready. And this time, they won't trust the adult in charge, which is easy enough when it's enormous, lurking, unfriendly Mr. Frank. As they get closer to opening the books and their parents' histories, an unexpected foe is watching everything they do. -- adapted from jacket

Ages 8-12 years.,Delacorte Press.