"Eleven-year-old Brian's summer turns out a lot less boring than expected when he encounters a huge, wacky house in the forest and befriends the eccentric family that lives there"--
"When the missing button for their new apartment building's thirteenth floor suddenly appears, identical twins Mal and Colm are pulled into an eerie adventure in [a] parallel dimension [populated by ghosts]"--Provided by publisher.
"Twelve-year-old Minerva Keen forms a detective club to uncover who is poisoning residents of her storied Chicago apartment building, knowing that any one of her neighbors could be the poisoner--or the next victim"--