Doctor Benjamin Schröder was far from a man of action. In fact, he was a history teacher - chairman of the Castle Rock University history department - and if his life wasn't perfect, it was close. Until, that is the discussion of his star student Elzbietá Abramowski's dissertation on Operation Oz, the Pacific Allies' invasion of Vladivostok, was brutally interrupted. The psychotic episode that turned his entire world upside down struck with absolutely no warning, and it was more terrifying than anything he should have been able to imagine.

Earth is conquered. The Shongairi have arrived in force, and humanity’s cities lie in radioactive ruins. In mere minutes, over half the human race has died. Master Sergeant Stephen Buchevsky, who thought he was being rotated home from his latest tour in Afghanistan, finds himself instead prowling the back country of the Balkans, dodging alien patrols and trying to organize the scattered survivors without getting killed.

Idealistic Navy Lieutenant Jacob Grimm just wanted to honor his mother’s sacrifice in the last great war. When he’s forced to return fire and destroy a squadron of ships to save his own, he thinks he’s the hero...until they discover the ships are full of children. Disgraced and denied promotion, Jacob’s career is over. That is until the head of ONI needs a disposable officer to command a battered destroyer on the rim.

For more than fifty years, the Terran Republic and the Terran League have been killing one another. The death toll has climbed ever higher, year after year, with no end in sight. But the members of the Five Hundred, the social elite of the Republic's Heart Worlds, don't care.

Arcana has never encountered another intelligent species while exploring scores of other worlds. No cities, no vast empires, no civilizations, and no equivalent of their own dragons, gryphons, spells, and wizards. But all of that is about to change. It seems there is intelligent life elsewhere in the multiverse. Other human intelligent life, with terrifying new weapons and powers of the mind...and wizards who go by the strange title of ''scientist''.