Blood Colony is a novel by writer Tananarive Due.
A hidden African clan of immortals possesses blood with the power to heal almost any ailment, including HIV/AIDS.
The story centers on Fana Wolde, a unique young immortal born with extraordinary abilities.
When her mortal best friend is imprisoned, Fana escapes her protected home and joins the Underground Railroad, a network distributing the life-saving blood.
Fana must confront these deadly forces as her people search for her and race to uncover the sect's origins, with the lives of everyone she loves at stake.