One of eleven top YA dystopian novels, as tagged at the Tor Teen blog:Replica by Jenna Black
Nadia Lake is in an arranged marriage with Nathaniel Hayes, heir to the powerful company that pioneered human replication. Nate shows little interest in Nadia. But then he’s killed. Nadia and Nate (in replicant form) work together to find Nate’s killer, which is no easy feat when Nate has no memory of