Exile - The Lunnaria Trilogy
Publisher: Royal Hawaiian Press
In the distant future the humanity is subject to meticulous control and class segregation. The criterion for belonging to one of the classes is IQ, determined at birth according to measurements of synaptic density of the brain. Permits to have a child are issued by committees that severely assess the physical and mental health of future parents, and marriages between castes are prohibited.
The young librarian, Leeta finds herself accidentally at the center of political game and as the only witness to an attack on members of the global government she becomes a threat to many prominent figures. Her protector, Citizen Hakat, decides to send the girl to the moon, to an industrial city where she would be safer than on Earth.
The city of Lunnaria is completely dependent on supplies from Earth and theoretically falls under its jurisdiction, but it is really ruled by large mining corporations. Leeta gets assigned to the local police.