Via Starwars.com:

Last fall, Lucasfilm approached me with one of those offers you can’t refuse — the chance to write a quartet of young-adult books that would connect with Star Wars Rebels.

My editor explained that the setting of the Servants of the Empire series would be Lothal, with action taking place in Capital City, with its Imperial Academy, as well as in the lush green grasslands surrounding the city. The protagonist would be a supporting character from the show — Zare Leonis, a young Imperial cadet who helps Hera Syndulla’s rebels from inside the Imperial war machine.

The broad outlines of Zare’s story had been established: Zare was an immigrant to Lothal who dreamed of serving the Empire, following in the footsteps of his older sister Dhara, the star cadet at Lothal’s Imperial Academy. But Dhara would disappear under mysterious circumstances, forcing Zare to rethink his beliefs and risk everything to find her.

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