Regina Shen is pursued by the notorious Department of Antiquities for her unique DNA. She jumps the Barrier Wall into the Federation to find her kidnapped sister. Stuck on a heavily-guarded closed university campus, she must use her wits to escape and rescue her sister without letting either of two rival Antiquities inspectors capture her.
The second book in the Regina Shen series is even more exciting than the first! Regina has grown so much as a person. She’s strong-willed, independent, and pretty awesome. The lore behind the story was great too. I never knew what to expect while reading.

(by Mira at http://booksareforever.weebly.com/blog/book-review-regina-shen-vigilance)