La Red Del Cielo Es Amplia by Lian Hearn

Set in a vividly rendered, fictionalized feudal Japan, the novel follows tangled loyalties, secret clans and a doomed romance as characters navigate betrayal, revenge and the costs of power; through political intrigue and the shadowy world of trained killers, personal choices about love and honor have far-reaching, often tragic consequences that reshape lives and the balance between competing houses.