XANADU by Vicky Wyman. The magic lives on in the lands of Xanadu! In XANADU: THIEF OF HEARTS and its sequel XANADU: ACROSS DIAMOND SEAS we relive the adventure of this wonderful series as a daring thief falls in love and becomes entangled in the intrigues amongst the fantastic Nobles, while the unicorn Empress who rules them all strives to hold her Empire together.