A million thoughts, but only one right thing to do. Eighteen-year-old Serenity Ashdown has a brilliant mind: she counts, calculates, and analyses everything, all the time. Awkward. When her father suddenly disappears, Serenity follows his trail to a parallel dimension. The feds on the other side claim to want to help her go home, if she helps them reconstruct the right codes for the portal between worlds. But it's soon clear they want something more: a gateway for invasion, because this version of Earth is dying. When Serenity learns that her alter-ego was killed in battle, she assumes "the other Serenity's" identity and uses her unique abilities to lead the resistance in a mortal fight against the tyrannical super-government that is poised to invade her universe. Serenity has no idea how to be someone she's not, but she has to try-or she may not have a home to return to.

“A solid space adventure for fans of the genre’s classics.” —Kirkus Reviews It only takes one to make a difference. Just days before Jake Saunders plans on proposing to the love of his life, Jake is called upon once again to save his home, Earth. The Earthen Legion troops and its allies think they’re battling only pirates, but a new, more powerful foe from another galaxy flanks their forces and invades, in search of a weapon the planet didn’t even know it had. When Jake learns that this new enemy was responsible for the death of his father many years ago, he realizes he can finally face his true nemesis. The odds are stacked against Jake, but with the help of his friends and allies he’s made along the way, he must rally the remaining Legion troops and retake Earth before it’s too late. The fate of Earth and the fate of his love, rest in the balance.