Amy S. Foster

Not long ago, Ryn knew what her future would be - as a Citadel, it was her job to protect her version of Earth among an infinite number of other versions in the vast Multiverse at any cost....

An alternate reality that feels all-too-real, The Rift Uprising is the explosive start to a new trilogy that blurs the line between parallel universes - not to mention YA and adult science fiction - from acclaimed lyricist and storyteller Amy S. Foster....

As a Citadel, a genetically enhanced super-soldier, it was Ryn's job to protect her version of Earth among an infinite number of other versions in the vast multiverse. But when Ezra Massad arrived on Ryn’s Earth, her life changed in an instant....

To save her loved ones, unlock the mystery of who she is, and finally get revenge, a brave young woman must travel through teh multiverse and between alternate realities in The Rift Frequency, the exciting second book in Amy S. Foster's The Rift Uprising Trilogy....

For three years teenage supersoldier Ryn Whittaker served as a Citadel, guarding the Battle Ground Rift site....

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....