Six and a half deadly sins

"Laos, 1979. Dr. Siri Paiboun, the twice-retired ex-National Coroner of Laos, receives an unmarked package in the mail. Inside is a handwoven pha sin, a colorful traditional skirt worn in northern Laos. A lovely present, but who sent it to him, and why? And, more importantly, why is there a severed human finger stitched into the sin's lining?"-- --Amazon.com.