Homeworld — Harry Harrison

Jan Kulozik was one of Earth's privileged elite. A brilliant young electronics engineer, he enjoyed all the blessings of a 23rd-century civilization that survived global collapse and conquered the stars, unaware of the millions who slaved or starved to maintain his way of life.

Then Jan met Sara; a beautiful agent of the rebel underground dedicated to smashing Earth's rigid caste system. Through her he discovered the truth behind the lies he'd been taught. His every move watched by state surveillance, Jan risked his position and his life to restore humanity's heritage.