S. J. Rozan has the first four of her Bill Smith/Lydia Chin (or vice versa) P.I. novels available for Kindle at $2.99 right now. I believe Rozan has won all of the major mystery awards, several of them multiple times.
In order:
China Trade
Concourse (won the Shamus Award)
Mandarin Plaid
No Colder Place (won the Anthony Award)