The Sacred Book of the Werewolf by Victor Pelevin
In modern Russia, a werefox prostitute falls in love with a werewolf FSB (formerly KGB) agent, and seeks enlightenment through philosophy and Buddhism. Sexy and smart, and full of Nabokovian turns of phrase. Just as the fox's tail spins a glamour on her clients, Pelevin's wordplay ensorcells the reader, and a satire of contemporary Russia transmutes into a profound exploration of the very notion of existence itself. Absolutely brilliant, and easily the best book I've read this year.