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.

Jason Mondy’s world is unraveling. He’s frustrated with his job, and his most recent girlfriend has just walked out on him. Even a simple trip home to find some rest leads his adoptive mother to share a stunning secret she’s kept for more than 26 years.... Jason has a brother he doesn’t remember existed.  

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….

Eleri Eames didn’t think she’d ever be allowed to work for the FBI again, so the special FBI division of NightShade seems like an amazing opportunity. But all too soon, her chance to start over starts to disturb her.