The Mission by Laura S. Kearney
Approx. 96,070 words.
Published on November 21, 2012.
Vassal prince Kayano Rithael wants his kingdom back. He has two weeks to spy out enemy defenses before beginning his military coup, but assassins stalk his heels, and his own adviser resents him. At every turn, new obstacles or intriguing developments threaten the success of his mission. And if he can't straighten things out before the appointed day, the coup may be over before it even begins!