"The Killing of Worlds: Book Two of Succession" is one of the best examples of early 21st Century space opera science fiction I am aware of, light years ahead of popular works like David Weber's "Honor Harrington" series with regards to the quality of the writing and of its protagonists. Scott Westerfeld has written some of the best space battles I've come across, that are most admirable for their excellent plotting and tense action. His "Succession" novels are also excellent studies in character, replete in richly drawn characters like Risen Emprire Imperial Navy Captain Laurent Zai and his lover, the young, charismatic Senator Nara Oxham, and Zai's Executive Officer, Katherie Hobbes. For decades, the Risen Empire - whose elite, the Risen, are those who have attained immortality - has been engaged in a bitterly fought contest with the Rix, cybernetically-enhanced humans. Sent to the remote Imperial world of Legis in a failed attempt to rescue the Emperor's sister from her Rix captors, Captain Laurent Zai and the crew of the prototype Imperial frigate Lynx are hopeless outmatched against a larger, more powerful, Rix battlecruiser. Meanwhile, at the Imperial capital, Senator Nara Oxham engages in a deadly political game of wits with the Emperor and the Risen elite, The Apparatus, in possession of state secrets concerning the true nature of Captain Zai and the Lynx's mission. In Legis space Zai makes an unexpected discovery from the Rix that threatens to shake the very foundation of the Risen Empire and the throne of its immortal Emperor. Westerfeld weaves between Zai and Oxham's brief romantic encounter days before he assumes command of the Lynx, Oxham's political brinkmanship, and Zai and his crew's nearly suicidal efforts to escape the Rix battlecruiser. While Westerfeld's writing lacks the eloquence of Alastair Reynolds in the latter's "Revelation Space" novel, both it and Reynolds' work are superb examples demonstrating how a clichéd subgenre of science fiction, space opera, can be transformed into high literary art.