The Secret of Castle Cant

Lucy Wickwright, maidservant to the Baron of Cant's daughter, does what she's told, never lies, and always takes the blame for her mistress's whims, which unwittingly leads her to become a spy in a mysterious rebellion that is pitted against her own mistress. When Lucy discovers that she is actually the true heir of Cant and at the heart of the revolution itself, she must choose between foiling the rebels, who support her right to the throne, or betraying her own flesh and blood.