Birthmarked is a dystopian novel about a society with 2 classes of people, the privileged few inside the Wall and the multitude that eke out an existence outside the Wall. Normally the 2 groups only interact through commerce with one major exception - every month, 3 babies born outside of the Wall are 'advanced', or taken from their parents and given to adoptive families inside the Wall under the excuse of giving some children a better life. 16-year old Gaia Stone and her mother are midwives for the Western sector and it their job to bring the newborns to the gates to be advanced. When Gaia's parents are suddenly seized and imprisoned inside the Wall, Gaia decides to sneak inside the Wall and try to rescue her parents. Instead, she discovers the secret behind why babies are taken from their families.This book started out with so much promise. A dystopian world with a very original problem. Maybe I've read too many dystopian young adult books recently, but I found the romance interest that Gaia develops to be forced and not that relevant to the plot. I also thought the ending fizzled out a bit and didn't have a very strong conclusion - but definitely gave strong hints of a sequel.