Mindscan

Jake Sullivan watched his father, suffering from a rare condition, collapse and linger in a vegetative state, and he's incredibly paranoid because he inherited that condition. When mindscanning technology becomes available, he has himself scanned, which involves dispatching his biological body to the moon and assuming an android body. In possession of everything the biological Jake Sullivan had on Earth, android Jake finds love with Karen, who has also been mindscanned. Meanwhile, biological Jake discovers there is finally another, brand-new cure for his condition. Moreover, Karen's son sues her, declaring that his mother is dead, and android Karen has no right to deprive him of his considerable inheritance. Biological Jake, unable to leave the moon because of the contract he signed, becomes steadily more unstable, until finally, in a fit of paranoia, he takes hostages. Sawyer's treatment of identity issues — of what copying consciousness may mean and how consciousness is defined — finds expression in a good story that is a new meditation on an old SF theme, the meaning of being human. (Amazon.com)
Won John W. Campbell Memorial Award for Best Science Fiction Novel in 2006