Commander Cassandra Kresnov has her hands full. She must lead an assault against the Federation world of Pyeongwha, where a terrible sociological phenomenon has unleashed hell against the civilian population. Then she faces the threat from a portion of League space known as New Torah, in which a ruthless regime of surviving corporations are building new synthetic soldiers but taking the technology in alarming directions.

Cassandra Kresnov is a highly advanced hunter-killer android. She has escaped the League and fled to Callay, a member of the Federation. Because of her fighting skills she was able to save the president's life and is now a trusted member of the security forces. However, not all Tanushans are happy to have her on their turf and Cassandra has to tread carefully. As Callay moves towards a vote on whether to break away from the Federation, confusion reigns and terrorist groups plot their own agendas.

Crossover is the first novel in a series which follows the adventures of Cassandra Kresnov, an artificial person, or android, created by the League, one side of an interstellar war against the more powerful, conservative Federation. Cassandra is an experimental design — more intelligent, more creative, and far more dangerous than any that have preceded her. But with her intellect come questions, and a moral awakening. She deserts the League and heads incognito into the space of her former enemy, the Federation, in search of a new life.

Two years after the unhatching of Callayan President Neiland's plot to make the capital city of Tanusha the center of the Federation, Callay is under siege. So begins the third installment of this gripping trilogy from an exciting new sci-fi author. A powerful faction of conservative Fleet captains has surrounded Callay, at Earth's behest, and is threatening a blockade - or worse. A fearful Earth does not wish to lose direct control of its precious war machine, and there are fears of civil war. All that Callay has to oppose the warships of the Fleet is the Callayan Defense Force (CDF) - a newly formed group of raw recruits led by a politically hamstrung general. However, the CDF is largely trained and organized by Major Vanessa Rice and her best friend, Callay's combat-android, Commander Cassandra Kresnov. But when Cassandra's lover, Special Agent Ari Ruben, discovers a plot to kill her using a killswitch, which her old masters in the League built into her brainstem, Sandy is forced to go underground to stay alive.

In 23 Years on Fire, Cassandra discovered that the technology that created her has been misused in her former home and now threatens all humanity with catastrophe. Returning home to Callay, she finds that Federation member worlds, exhausted by the previous thirty-year-war against the League, are unwilling to risk the confrontation that a solution may require. Some of these forces will go to any lengths to avoid a new conflict, including taking a sledgehammer to the Federation Constitution and threatening the removal by force of Cassandra's own branch of the Federal Security Agency.

A quarter of a million people die in the destruction of the moon Cresta. The League civil war is accelerating out of control, but projections indicate that as their technologically induced sociological dysfunction continues, all of humanity may face a similar fate. In the aftermath of Cresta's destruction, Sandy Kresnov discovers the alien Talee operative Cai in Tanusha, there to learn just how far the technologically-induced insanity has gone. The Talee have seen this before, and they are terrified of anything threatening a recurrence.