A volume in the Earthbound Series Volume IV of the Earthbound Series: Nykkyo, now a widower living with Suki's mom and her son, carries an incredible secret about her death. As New York recovers from the 9/11 attack, there is an outbreak of a fatal virus on Earth and one of his Floran co-workers dies. Nyk thinks the virus is of alien origin -- a biological weapon created by a faction on a rogue colony. He teams up with his ex-wife in a race against time to develop a cure before the separatists can unleash their plague.
A volume in the Earthbound Series Nykkyo Kyhana is an ordinary guy: He has a boss, a job that's a grind, a wife who doesn't understand him and a high-maintenance girlfriend on the side. He just happens to hail from another planet -- one 200 lightyears from Earth and with a history that's inextricably entwined with Earth's future. He is sent to Earth to gather plants for his homeworld's agriculture. That mission becomes far from mundane when he meets a woman and realizes his civilization's survival may hinge on her fate.
A volume in the Earthbound Series Volume 2 of the Earthbound Series: Nykkyo adjusts to life on his adopted world and living with Sukiko. Meanwhile, authorities on his homeworld begin to question the actions of his friend Andra. They believe she is aiding Lexal, a rogue colony, prepare an invasion force. Nyk is asked to travel to Lexal and bring Andra to justice. Arriving on Lexal Nyk discovers things are not as they seem, and he finds himself in the midst of a civil war. He and Andra must run for their lives.
A volume in the Earthbound Series Volume V of the Earthbound Series: By a few hundred years after the founding of Nykkyo's homeworld Florans had returned to space to colonize other worlds. One such colony was Varada, which eventually left the hegemony but now desires re-unification. With his talent with languages, Nyk accompanies a delegation to Varada, to serve as interpreter. There, he learns a terrible secret about Varadan society, and he uncovers a sinister motive behind a Floran faction's interest in the forsaken world.
A volume in the Earthbound Series Volume III of the Earthbound Series: Nykkyo proposes to Sukiko and she accepts. Meanwhile, Nyk's vindictive ex-wife Senta informs homeworld authorities of his involvement with an Earth woman -- something expressly forbidden. Nyk is confined to his planet and forbidden from having contact with Suki. He searches family records from the founding days of his world and finds a document that could clear his name. However, the same document reveals that Suki has less than a year to live.