The Rift Uprising Trilogy Series by Amy S. Foster, Claire Coffee

Seventeen-year-old Ryn Whittaker is a Citadel: an elite, enhanced soldier specially chosen to guard a Rift, a mysterious and dangerous portal to alternate Earths scientists cannot control or close. Trained from the age of fourteen, Ryn can run faster, jump farther, and fight better than a Navy SEAL—which is good when you’re not sure if a laser-wielding Neanderthal or an axe-wielding Viking is trying to make it through the Rift and into her world... moreSeventeen-year-old Ryn Whittaker is a Citadel: an elite, enhanced soldier specially chosen to guard a Rift, a mysterious and dangerous portal to alternate Earths scientists cannot control or close. Trained from the age of fourteen, Ryn can run faster, jump farther, and fight better than a Navy SEAL—which is good when you’re not sure if a laser-wielding Neanderthal or an axe-wielding Viking is trying to make it through the Rift and into her world.But the teenager’s military conditioning and education have not prepared her for the boy who crosses through—a confused young man, seemingly lost and alone. Because while there’s an immediate physical attraction, it’s his intelligence and curiosity that throws Ryn off balance. The stranger asks disturbing questions about the Rift that Ryn herself has never considered—questions that lead her to wonder if everything about her life and what she’s been told these past six years has been a lie. Are the Rifts as dangerous as her leaders say? Should her people really try to close them . . . or learn how to travel through them? less

To save her love and unlock the mystery of who she is, a brave young woman must travel between alternate realities in The Rift Frequency, the exciting second book in Amy S. Foster's The Rift Uprising Trilogy.She didn't mean to, but...Teenage super-solider Ryn Whittaker started an uprising... moreTo save her love and unlock the mystery of who she is, a brave young woman must travel between alternate realities in The Rift Frequency, the exciting second book in Amy S. Foster's The Rift Uprising Trilogy.She didn't mean to, but...Teenage super-solider Ryn Whittaker started an uprising.For three years Ryn was stationed at The Battle Ground Rift site--one of the fourteen mysterious and unpredictable tears in the fabric of the universe that serve as doorways to alternate Earths--and then she met Ezra Massad.Falling in love and becoming a rebel Citadel wasn't part of Ryn's life plan, but with Ezra there asking all the right questions, they began to decode what's really going on with the Allied Rift Coalition, and what they discovered was enough to start a civil war.When the base explodes with infighting and Ezra gets caught in the fray, he is accidentally pushed through the Rift, taking a stolen laptop--and the answers it could give Ryn--with him.Now all Ryn wants is to locate Ezra and get back to her Earth. But that's not easy when she's traveling the multiverse with Levi, the painfully guarded Citadel who shoved Ezra through in the first place. And Ryn is quickly learning that inside the multiverse there is no normal--it's adapt, or die--and the one weapon she really needs to win the war back home is the truth. less

11 Hours and 51 MinutesThe exciting, action-packed finale to The Rift Uprising trilogy that rivals the thrills and action of The Hunger Games and Red Rising.Ryn Whittaker started an uprising. Now she has to end it.Not long ago, Ryn knew what her future would be-as a Citadel, a genetically enhanced super-soldier, it was her job to protect her version of Earth among an infinite number of other versions in the vast Multiverse at any cost... more11 Hours and 51 MinutesThe exciting, action-packed finale to The Rift Uprising trilogy that rivals the thrills and action of The Hunger Games and Red Rising.Ryn Whittaker started an uprising. Now she has to end it.Not long ago, Ryn knew what her future would be-as a Citadel, a genetically enhanced super-soldier, it was her job to protect her version of Earth among an infinite number of other versions in the vast Multiverse at any cost. But when Ezra Massad arrived on Ryn's Earth, her life changed in an instant, and he pushed her to start asking why she was turned into a Citadel in the first place.What began as merely an investigation into her origins ended up hurling Ryn, Ezra, and Ryn's teammate Levi through the Multiverse and headlong into a conspiracy so vast and complex that Ryn can no longer merely be a soldier . . . she must now be a general. And in becoming a true leader, she must forge alliances with unpredictable species, make impossible decisions, and face deep sacrifices. She must lead not thousands, but hundreds of thousands of troops under her command and in doing so, leave any trace of her childhood behind.Ryn always knew that she was created to fight. But now she must step forward and lead. less