Omega City Series by Diana Peterfreund

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... moreGillian 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. less

Perfect for fans of The Goonies and Rick Riordan, The Forbidden Fortress is the thrilling sequel to Omega City, from acclaimed author Diana Peterfreund.Gillian Seagret is not having a great summer... morePerfect for fans of The Goonies and Rick Riordan, The Forbidden Fortress is the thrilling sequel to Omega City, from acclaimed author Diana Peterfreund.Gillian Seagret is not having a great summer. Her mother’s come back with plans to move Gillian and her brother across the country, and her father is away promoting his new book on Omega City—without her! Though Gillian and her friends were the ones to find the lost doomsday bunker, no one seems to care about their thoughts on the whereabouts of its creator, Dr. Underberg, or learning the truth about the Shepherds, a mysterious group that will stop at nothing to keep Underberg—and Omega City—a secret.All that changes when Gillian and her friends are invited to speak at a lecture series at Guidant Technology. Finally they’re being recognized for their adventures! The Guidant campus is full of wonders, from self-driving cars to robot waiters, and the future-focused employees seem like worth heirs to Dr. Underberg.But there are secrets here, too—a radio station that plays nothing but coded numbers, and an island that doesn’t appear on any map. And when Gillian and her friends uncover evidence that the Shepherd conspiracy goes deeper than anyone suspected, it’s up to them to infiltrate the Shepherds’ secret base and expose them . . . before it’s too late. less

Perfect for budding scientists and history buffs, as well as fans of The Goonies and Rick Riordan, Infinity Base is the thrilling finale to the Omega City series, from acclaimed author Diana Peterfreund.Gillian Seagret thought she knew everything about the secrets of Omega City, the mysteries of the rocket scientist Dr. Underberg, and the evil conspiracies of the organization called the Shepherds. But she’s about to learn that uncovering the truth is the easy part. You also have to fight for it... morePerfect for budding scientists and history buffs, as well as fans of The Goonies and Rick Riordan, Infinity Base is the thrilling finale to the Omega City series, from acclaimed author Diana Peterfreund.Gillian Seagret thought she knew everything about the secrets of Omega City, the mysteries of the rocket scientist Dr. Underberg, and the evil conspiracies of the organization called the Shepherds. But she’s about to learn that uncovering the truth is the easy part. You also have to fight for it.Now Gillian’s father has been taken captive, and she and her friends are trapped in the Shepherds’ hidden base. The only person who can help them is a rogue Shepherd, but she has plans of her own, and no one—least of all Gillian’s mother—is sure they can trust her.New clues to Underberg’s past lead them back into an utterly transformed Omega City and farther than they even imagined, into outer space. There, Gillian, Eric, Savannah, and Howard discover the Shepherds’ most precious secret, and they realize there’s more at stake than simply their family and Underberg’s legacy—they also have to save the world.Full of thrilling adventure, cliffhangers, and conspiracies, this epic conclusion to the Omega City series is not to be missed. less