The Maltese Falcon2 books in series
Spade & Archer Publisher's Summary
1921: Spade sets up his own agency in San Francisco and clients quickly start coming through the door. The next seven years will see him dealing with booze runners, waterfront thugs, stowaways, banking swindlers, gold smugglers, bumbling cops, and the illegitimate daughter of Sun Yat-sen; with murder, other men's mistresses, and long-missing money. He'll bring in Archer as a partner, though it was Archer who stole his girl while he was fighting in World War I. He'll tangle with a villain who never loses his desire to make Spade pay big for ruining what should've been the perfect crime. And he'll fall in love - though it won't turn out for the best. It never does with dames.
Spade & Archer is a gritty, pitch-perfect, hard-boiled novel - the work of a master mystery writer - destined to become a classic in its own right.