Book 1

Cluster

by Piers Anthony

Published 1 April 2014
First in the sci-fi series "packed with exotic beings, ancient secrets, and futuristic worlds" from the New York Times-bestselling author (The Portalist).

As Cluster opens, the alien envoy Pnotl of Sphere Knyfh seeks help from Sphere Sol in a shared galactic-level crisis: Galaxy Andromeda has discovered the secret of energy transfer and intends to use it to steal the basic energy of the Milky Way Galaxy. Knyfh offers the secret of aura transfer on the understanding that Sphere Sol will spread the technology to help create a galactic coalition to find and defeat agents of Andromeda. Sol's highest-Kirlian individual is Flint, a green-skinned native of Outworld, who has a Kirlian aura of two hundred, an eidetic memory (useful for memorizing the complex equations of Kirlian transfer that he will need to communicate to other spheres). He has extraordinary intelligence and is highly adaptable. His mission is complicated, however, by the fact that he is pursued everywhere by a very high Kirlian female Andromedan agent and, somehow, the Andromedans are able to detect and trace Kirlian transfers. Flint embarks upon several missions to bring transfer technology to neighboring spheres, inhabiting various alien forms. His efforts are successful despite attacks and sabotage by the Andromedan agent. Through the conflict, however, the mutual attraction of their two vastly superior auras begins to undermine their individual loyalty to their own Spheres. Flint and a group of other entities recover the information that will allow them to detect and trace transfers, and a member of the group is revealed as the Andromedan agent. One result is the catastrophic destruction of the local habitat. Flint and his nemesis are transferred into alien Mintakan bodies to survive. Choosing to leave things with parity between their two galaxies, Flint and the Andromedan mate and remain together until their auras fade (which happens rapidly, since their physical bodies have been destroyed).

Book 2

Chaining the Lady

by Piers Anthony

Published 22 February 1979
An alien being is out to save the galaxy in book two of the New York Times-bestselling author's Cluster series.

Chaining the Lady is the second Cluster book. Melody, a product of Flint and the Andromedan's mating in Cluster, must save the Milky Way Galaxy and create a place where creatures can transfer without limitations. Melody must survive in worlds unknown and alien to her and she does that where others fail when her aura augments her skills and abilities. The book opens with the discovery that Andromeda, the enemy galaxy of the first novel, has discovered the secret of involuntary hosting: a Kirlian aura that is sufficiently stronger than that of an individual can take possession of that individual. Andromeda has secretly infiltrated the highest levels of government in Sphere Sol and its allies and resurrect its plot to steal the energy of the Milky Way. Melody of Mintaka, a direct descendant of Flint of Outworld and his Andromedan nemesis, has a Kirlian aura of well over two hundred. She is pressed into service to "possess" and interrogate a captured Andromedan transferee. Melody, hosted in the young and beautiful body of Yael of Dragon, must, like her progenitor Flint, find a way to defeat the Andromedan threat and save the galaxy. The mysterious Ancients are present again in the form of their artifacts and sites. The themes of Tarot and of various myths of Sphere Sol (in this case that of Perseus and Andromeda) play a big part this novel. The InterSphere fleet of starships has forms analogous to the Tarot suits of Disks, Cups, Wands, and Swords.

Book 3

Kirlian Quest

by Piers Anthony

Published 19 July 1979
Two warring galaxies unite against a common threat in this continuation of the New York Times-bestselling author's Cluster series.

Twice before, Milky Way Galaxy has been on the verge of extinction, and twice before, a heroic defender has come forward to throw back the invaders from Andromeda Galaxy. In Kirlian Quest, the galaxies are united in an alliance of peace. But Hweeh of Weew, the Milky Way's leading research astronomer, observes that Amoeba-just beyond the galaxies' common frontier-is expanding ominously in the direction of the twin galaxies. Herald the Healer is called in. Armed only with his hyper-intense Kirlian aura, he wages an almost single-handed battle against the greatest threat ever to face the galaxies. But first he must unravel the secrets of the Ancients-astounding secrets whose import could never have been imagined . . . For a thousand years Sphere / of Andromeda was cursed by the other spheres because a representative, Llume of /, betrayed Andromeda during the Second War of Energy. As Kirlian Quest opens, a new threat has appeared on the horizon: the Space Amoeba, a fleet of alien ships one million stron g, whose intentions are definitely hostile. Herald the Healer, aural (but not literal) descendant of Flint and Melody, who is a / of Andromeda, has the chance to redeem his species' honor and save the galaxy, but in order to do so he must solve the riddle of the Space Amoeba and of the Ancients themselves.

Book 4

Thousandstar

by Piers Anthony

Published 2 August 1984
In this novel from the New York Times-bestselling author, the discovery of a new Ancient Site triggers an intergalactic competition to exploration.

On the world called Eccentric, a new Ancient Site has been discovered, and unlike others that are "dead," this one appears to be active and functioning. To determine which Sphere has the right to explore it and investigate its secrets, a competition is being held. Each competing team consists of a carefully matched host and transferee pair, chosen for their complementary skills and knowledge. The tasks test all of the competitors' abilities to their limit, and range from word puzzles to navigating past a black hole. However, both Heem of Highfalls and his transferee Jessica of Capella have deep, dark secrets that may cost them not just the competition, but their lives.

Book 5

Viscous Circle

by Piers Anthony

Published 1 May 1982
A warlike alien species is bent on destroying a pacifist alien species in this intergalactic adventure novel from the New York Times-bestselling author.

Viscous Circle is a story about a strange and inhuman race of beings and an experimental attempt to transfer into creatures that seem only slightly sapient. They are ultimate pacifists who take the form of magnetic disks that float through space and simply demagnetize and destroy themselves when faced with an unpleasant thought. The bloodthirsty Solarians, in their desperate hurry to find the mysterious Ancient Site, are determined to wipe out the Bands, a strange and beautiful species whose society is an anarchy of peace. Only Rondl, the whirling green Band, can save his race, for he has a singular and awesome knowledge. But suddenly Rondl makes a shocking discovery about his identity-a discovery that may cost him his honor, his beautiful lover Cirl, even his very life.

The Cluster Series

by Piers Anthony

Published 7 August 2018