Foster, Amy S., 1973- Rift uprising trilogy #3

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