Piers Anthony 
Cluster Series 
Cluster, Chaining the Lady, Kirlian Quest, Thousandstar, and Viscous Circle

“Original and fascinating . . . entertaining and beautifully written, ” the complete series from the New York Times–bestselling author of the Xanth Novels (Science Fiction Review).   Seamlessly blending science fiction and fantasy, New York Times–bestselling author Piers Anthony presents an epic adventure series in a completely original universe.  Cluster: In a battle to control the energy of the Milky Way galaxy, two adversaries of superior Kirlian auras—green-skinned Flint of Outworld and a female Andromedan agent—are irresistibly drawn to each other.  Chaining the Lady: Melody of Mintaka, a direct descendant of Flint and his Andromedan mate, must save the Milky Way from the enemy Andromedans, who have discovered the secret of involuntary hosting—possessing another individual via a stronger aura.  Kirlian Quest: With his hyper-intense Kirlian aura, Herald the Healer, an aural descendant of Flint and Melody, must unravel the secrets of the Ancients to defend against the Space Amoeba, a fleet of alien ships a million strong.  Thousandstar: A new Ancient Site has been discovered, and in the competition to explore it, both host Heem of Highfalls and his transferee, Jessica of Capella, harbor secrets that may cost them their lives.  Viscous Circle: The bloodthirsty Solarians, desperate to possess the secrets of the Ancient Site, target the Bands, strange and beautiful pacifist beings, and only Rondl has the knowledge to save his race from extinction.