When Jack Chambers receives news of his father's death, he does not feel grief. He has not seen him for fifteen years. He is surprised, however, to learn of his appointment as executor of the will -- a duty that seems simple, but turns ominous once he reads its contents. Labeled a madman by some, a scientific genius by others, Timothy Chambers left behind a luxury apartment on Chicago's Lake Shore Drive, a secret home in Rome, and one bizarre item, a leather-bound manuscript titled Invisibility: A Manual of Light. The will assigns Jack two tasks: publish the manuscript, and track down an unknown woman who stands to inherit Chambers' wealth.

To accomplish both goals, Jack must first reunite with his estranged half-sister, Louise. Now grown into a stunning woman, Jack and Louise are drawn together by a tense attraction, but propelled by very different memories of their father. When they embark to Rome -- the heart of their father's shrouded life -- they discover a cult-like group of outcasts who were his followers. Their unwavering obsession is the pursuit of indigo -- a perfect cross between blue and black that, when achieved, disappears to the human eye. In indigo, Timothy Chambers had sworn, lay the secrets of invisibility.

As Jack ventures further into this surreal world he begins an incendiary affair with his father's lover, a sexually voracious artist who stands to inherit the estate. On the threshold of uncertainty, Jackglimpses both the intoxicating pleasures and pitfalls of the elusive indigo -- and perceives its horrid danger only when it is too late.

In his first novel of literary suspense, award-winning author Graham Joyce explores the far reaches of human passions and madness. INDIGO is an extraordinary thriller, in which one finds believing is not always seeing....