Middle Grade

Gillian Seagret doesn't listen to people who say her father's a crackpot. His conspiracy theories about the lost technology of Cold War–era rocket scientist Dr. Aloysius Underberg may have cost him his job and forced them to move to the middle of nowhere, but Gillian knows he's right and plans to prove it. When she discovers a missing page from Dr. Underberg's diary in her father's mess of an office, she thinks she's found a big piece of the puzzle—a space-themed riddle promising to lead to Dr. Underberg's greatest invention. Enlisting the help of her skeptical younger brother, Eric, her best friend, Savannah, and Howard, their NASA-obsessed schoolmate, Gillian sets off on a journey into the ruins of Omega City, a vast doomsday bunker deep inside the earth,. But they aren't alone inside its dark and flooded halls. For while Gillian wants to save her dad's reputation by bringing Dr. Underberg's secrets to light, there are others who will stop at nothing to make sure they stay buried . . . forever.

Something is not right at Rookskill Castle, a rundown Scottish manor shrouded in mystery. The castle is a temporary boarding school for children escaping the Blitz, but soon it’s clear there is something terribly wrong. There are clues hinting that a spy is in the house, and there are undeniable signs of a sinister magic. When the children in the castle’s temporary boarding school begin disappearing one by one, it’s a race against the clock for twelve-year-old Kat Bateson, her two younger siblings, and their new best friend.