Michael Collins: Minnesota Strip (USA 1988)

From the Publisher:
Hired to track down a missing kid bent on avenging the brutal murder of a beautiful Vietnamese refugee, Dan Fortune finds himself deep in a nasty network of white slavery, narcotics and hired killers. The bloody trail of bodies gets uglier and more complex by the minute. Fortune has to make it all add up - before someone adds his name to the list.

Michael Collins: Minnesota Strip. Dan Fortune is back... neck deep in murder. Harlequin Books, ISBN: 0373970935 (November, 1988), 281 p., $3.95.