“The Theos await you. Only then will we stop the Unwinding.” The threat of invaders is gone, and Earth has been bartered away as a price for peace. Yet, the human world of New Spero is thriving and full of hope. Joining the rank of the Gatekeepers, Dean and Mary set off to explore worlds connected by the mysterious portals. When they stumble upon a strange symbol, they are led to an ancient object, one that sets them on an unstoppable path. The journey takes them through multiple worlds, before they can find what they’re searching for.

A mysterious convergence of natural disasters threatens to destroy life as we know it, and people across the United States are going missing. With no one left to investigate, Special Agent Kendra Baker takes the case, trying to solve the disappearances before she’s out of time. Among those abducted is Valeria Miller, the daughter of ex-Marine Corporal Andrew Miller, and he’ll stop at nothing to find her. With the help of an unstable conspiracy theorist, they find themselves on the trail of a reclusive billionaire who just might have all the answers. 

Rex Walker always wanted to be like his father: a daring, adventurous man, traveling the world in pursuit of mysterious relics. While teaching anthropology at a Boston college, Rex attempts to bury the past, until he discovers a hidden clue he can’t ignore. With the help of a former student, he teams up with an alien-obsessed billionaire, and they search for the fabled Bridge. As an unidentified object nears Pluto, speculation surges. Some hail it as the homecoming of a distant alien race, and this cult is unwavering in their efforts to usher our world into a new era.

They’ve watched us for centuries through the Rift. They’ve prepared. Invasion is inevitable. The Earth Fleet has known of the Watchers for years, unwilling to share the knowledge with humanity. Now it might be too late. Hidden away from the Fleet, one man is creating a new colony ship destined for the other side of the Rift, but he’s missing a few pieces. Three other people have varied paths to get there. Ace goes from the streets of Earth to the Fleet training facility on the moon. Flint, an ex-Fleet pilot, must decide if a job is worth his life.

Thomas Baldwin has been appointed captain of the state-of-the-art cruise ship Constantine, named after his heroic grandfather. When their first diplomatic mission turns deadly, all signs point to the return of a former adversary, one the Concord claims to have defeated five decades earlier. No one has seen Baldwin's commander, Treena Starling, since her previous ship was destroyed in a gruesome battle, leaving her the sole survivor. Can her secret help them rescue one of their crew members from captivity at the enemy's hands?

Arlo Lewis was resigned to his station in life as a supply hauler for one of the Primary Corporations ruling Earth, until an acquisition forces him to re-evaluate his situation. When he’s hand selected to lead SeaTech’s Race team, he struggles to return to the competitive field he abandoned as a teenager. With an eager team, and the promise of a better future, Arlo takes on the challenge, only to find more at stake than the rights to Proxima. Under the threat of a revolution brewing at the finish line, things don’t go as expected.

Alec works in the Detroit Overseer-factories, building a mysterious alien device. When three strangers appear, he's provided an opportunity to escape after years of servitude. Cole, a Freeborn loner, encounters Lina after her village is destroyed by the alien Occupation. Together, they make the arduous journey to a fabled safe-zone, trying to stay one step ahead of the enemy drones on their trail. Dex is a Hunter, working for the Occupation to track down escaped factory slaves, or Roamers, at all costs. But his latest hunt uncovers a massive secret.

The United Nations of Earth sent out the Forerunner ships to explore and colonize the four most promising star systems within 50 light-years of Earth. Forerunner One left Earth under the command of Captain Clayton Cross, heading for Trappist-1. After a ninety year journey to reach it, the crew encountered not only a habitable world, but alien life already inhabiting it, and dark secrets lurking beneath the surface. The revelation of who these aliens are and what they want proves more terrifying than promising, and Captain Cross is forced to make tough decisions that will affect not only his crew, but the fate of the entire human race.

AD 2150: Chris Randall just lost his job as a bodyguard. That night, after picking up his wife, Bree, from her shift at a local casino, he breaks the bad news. Moments later, thunder cracks the sky, but there’s no lightning. Flaming debris rain across the valley, and a dark mass goes sailing out of the clouds, headed straight for LA. It’s not one of the Union’s starships, because they can’t defy gravity like that. But then, what is it? The answer chills both Chris and Bree to their cores: It’s an invasion.

Logan Willis’s life is falling apart: he lost his job and found out that his wife is cheating on him all in the same day. Thinking that his world has ended, Logan checks into a hotel and turns on the TV to see that he's not far wrong - radio telescopes have detected mysterious signals coming from inside our solar system, and the source is moving toward us at over 500 miles per second. The media concludes that these signals must be of an alien origin. Still reeling from the news, Logan gets a phone call from his brother-in-law. 

In 2018, Canadian archaeologist Ron Jackson makes a mind-boggling discovery in Antarctica - right before disappearing without a trace, leaving behind only his controversial theory that humans have lived on Earth far, far longer than we think they have. Decades later, in 2042, when Jackson's wife dies under mysterious circumstances, an unlikely pair of investigators, Agatha Devenworth and Pano Hofer, begin investigating whether her death might be connected to Jackson's disappearance. 

Bill Steele is in the trenches, trying to survive in the competitive world of luxury vacation resorts on the island of Kauai. Then a dark shadow falls over the island. It’s not a lunar eclipse, because Bill can clearly see the crescent moon shimmering on the water. This is something else. Moments later, the meteors begin to fall. One of them lands in the water just beyond the resort. On the news, the anchorman is fleeing from his hillside vantage point with his cameraman in hot pursuit. Their muffled screams are the last thing anyone hears before the signal is lost....

Not Alone: First Encounter is a prequel to the globally acclaimed Not Alone series, set several years before two worlds collide under the weight of the grandest conspiracy of all time. For the first time ever, First Encounter lifts the curtain on a deadly series of events surrounding the initial meeting between the ruthless Richard Walker - untouchable head of the controversial Interspace Defense Agency - and a young truth-seeker from Birchwood, Colorado.... 

Archaeologists Pippa Quinn and Charlie Jackson find advanced technology in undisturbed 16th-century graves. A portent, the discovery precedes thousands of giant sinkholes opening up across the globe as extreme weather threatens the population. Charlie suspects the two are related.

Thousands of crew are reported dead, including the ship’s captain. Reluctantly, the young XO, Galvin Quintos, will be taking command of the fleet's crippled dreadnaught, the USS Hamilton, while doing his best to bring fleet survivors back to Earth. To make matters worse, there’s a murderer running loose on board the ship, critically low fuel levels, and the Grish are back, in fast pursuit and ready to finish what they’d started. Only by sheer luck - and a good measure of cagey smarts - will Quintos be able to rise to the challenge.