The lure of the find behind the loose hearthstone at Hazleton House was too great. The schematic excited Evan, Reenie, and Ivy for different reasons, but it is Kayla who actually begins building it. Her ability to focus to the exclusion of all else is just one of the effects of her Asperger's. The scribbled initials, E. W., were merely a curiosity, until it's discovered they belong to Eli Whitney. But strange footprints and disturbing visitors let Evan know that the theft of his sister's prize schematic isn't just a coincidence.

Dr. Becky Sorenson has found a cache of frogs with a very high mutation rate...and some odd behaviors. Dr. David Carter’s core earth samples seem to indicate the next polar reversal will be worse than predicted. And CDC researchers Jordan and Jillian are looking at a strange new disease. When the four scientists delve deeper, they discover they are all looking at the leading edge of a sweeping magnetic polar reversal. As humanity ignores their increasingly panicked warnings, the scientists will have to fight to save everyone...if they even can.

Joule and Cage Mazur feel like prisoners in their home. With something new stalking the streets at night, their family’s only protection is bolting the door and embracing the darkness. And even though they manage to trap and kill one of the monsters, their locks won’t hold forever….

Out of the blue, a young Space Fleet officer's dream becomes reality: He's made captain of a starship. Just in time for the return of humanity's most terrible enemy, after 50 years of peace. To survive against this enemy, Captain Tad Thatcher will have to do more than learn how to become an effective commander, or how to wrangle his wayward crew. He will need to reinvent space combat. From scratch.

Deadly radiation from a passing comet is about to destroy life on Earth. In desperation, the US government constructs a series of underground shelters to protect as many people as possible. They are expected to be underground for 20 years before returning back to the surface. But can they survive their time within the confines of the underground shelter? And what will they find when they finally emerge?

A mysterious object crests the Sun during a total solar eclipse. Cryptic radio-frequency noise jams TVs and radios worldwide. Sinister alien artifacts inexplicably appear in the capitals of the world's powers. Paralyzed with fear, society begins to crumble. Former NASA scientist Jasmine Evans is the first to spot the object and sound the alarm. Recalled to investigate the mystery, her team makes a critical discovery. But nothing is what it appears to be.

Finn had thought he'd seen it all...but no...he had to admit...Not quite everything...There was a big universe out there and it was about to land in his lap. Just how bad could it be? Insubordinate and on the edge, Finn is a troubled war hero racked by guilt, overseen by an unyielding Commanding Officer while dragging his ragtag group of rookies through basic training. Suddenly caught up in a major global crisis, he joins with Gunner Zuri Zuberi, leading Delta Squad in a desperate struggle for survival when an alien incursion lands slap bang in the middle of their training session.

Join the Endurance's crew - a trigger-happy first officer, a hyperactive engineer, a shy covert operative, a conspiracy-spouting physicist, and a captain trying to earn his way back into his superiors' good graces....

Dylan First, a brilliant psychologist, is haunted by the horrific discovery of her past. Her mentor and father figure, a brilliant psychiatrist and professor, was secretly a serial killer. He is behind bars, but with everything Dylan thought she knew turned upside down, she feels lost when the FBI suddenly comes knocking. A new killer is using her mentor’s trademark signature. And they need Dylan to dissect his mind and stop him before it’s too late.

Lucy Sadler Caldwell is a successful true-crime writer. But the one story she's never been able to come to terms with is the murder of her own mother - until now. She's returned to Dobbs Hollow, Texas, the hometown she fled 17 years ago, to finally expose the real killer. When she starts digging into the past, she unearths a psychotic killer who will stop at nothing to silence her forever.

Suburban New Jersey Detective Napoleon “Nap” Dumas hasn't been the same since senior year of high school, when his twin brother Leo and Leo’s girlfriend Diana were found dead on the railroad tracks - and Maura, the girl Nap considered the love of his life, broke up with him and disappeared without explanation. For fifteen years, Nap has been searching, both for Maura and for the real reason behind his brother's death. And now, it looks as though he may finally find what he's been looking for.

Coco Wells hasn’t seen another living person since she was a teenager. All of Manhattan is reliving the same few seconds, minutes, or hours on a loop…and they have been for years. Everything looks normal from a distance, but up close, it’s a nightmare.

Michael, a professor of particle physics, has discovered a way to pierce the veil of time and space, but in so doing, he’s unwittingly opened Pandora’s box. Is it possible to undo what a future version of yourself has done, or is the world doomed to the chaos that’s been loosed on the world?

Emma Frederick bolts upright in bed, pulse racing. It must be a bad dream. Except it’s not. Crrrrrreeeeeeeeaaaaaaakkkkkkk. The sound of the loose step sends her body into overdrive, and she rushes for the secret room behind the wall. The screech of old hinges echoes through the house as he enters her bedroom. He starts whistling. Three blind mice. Three blind mice. She slaps a hand over her mouth, stifling her scream. He’s coming for her, but that can’t be. She killed him last month.

Ten years ago, PI Jessie Cole and reporter Ben Morrison each suffered a tragedy that changed their lives - and now these two strangers are about to share a nightmare. For Jessie, who makes her living finding missing persons, no case has consumed her more than the disappearance of her younger sister, Sophie. But left alone to raise Sophie's daughter, she realizes that solving the case has become an unhealthy obsession.