There's a giveaway for The Glimpse going on on Goodreads here!
In a near future, society is segregated according to whether people are genetically disposed to mental illness. 17-year-old Ana has been living the privileged life of a Pure due to an error in her DNA test. When the authorities find out, she faces banishment from her safe Community, a fate only thwarted by the fact that she has already been promised to Pure-boy Jasper Taurell.
When Jasper disappears, Ana sets off on his trail, determined to solve the mystery of his abduction. In doing so she journeys into the darkest corners of society, and uncovers some devastating truths that destroy everything she’s ever believed.