Consider other books set in an alternate history, such as Jonathan Strange & Mr. Norrell by Susanna Clarke.
Consider other books about human cloning, such as The Boys from Brazil by Ira Levin or The House of the Scorpion by Nancy Farmer.
Consider other books by Kazuo Ishiguro, such as The Remains of the Day.
Consider other books with unreliable narrators, such as The Sound and the Fury by William Faulkner and Lolita by Vladimir Nabokov.