Kiln People — David Brin

In a perilous future, disposable duplicate bodies fulfill every citizen's legal and illicit whim. Life as a 24-hour "ditto" is cheap, as Albert Morris knows. A brash investigator with a knack for trouble, he's sent plenty of clay duplicates into deadly peril, then "inloaded" memories from copies that were shot, crushed, drowned...all part of a day's work.

But when Morris tackles a ring of crooks making bootleg copies of a famous actress, he trips into a secret so explosive it incites open warfare on the streets of Dittotown.