Sidney St. James wrote "The Final Curtain Call," a renowned detective novel that exemplifies the locked-room mystery subgenre in detective fiction. In these stories, a crime, typically a murder, occurs under seemingly impossible circumstances.

The story unfolds in the gloomy, fog-laden Oak Hill area of Austin's West End. It begins with the shocking discovery of Ronald D. Parks' gruesome murder. Someone has cut his throat in his room, which was locked from the inside, and secured the windows, creating the perfect 'locked room' scenario. The absence of minimal struggle signs and a missing murder weapon only deepen the mystery.

Detectives Vincent James Gideon and Eddie Fisher lead the investigation. Gideon, a retired detective known for his unorthodox methods and deep criminal mind insights, contrasts with Fisher, his more conventional rival. Their different investigative approaches bring an intriguing dynamic to the story.

The real Sidney St. James, not his novel's character, explores the lives of various characters linked to Ronnie Parks. These include his landlady, Mrs. Jenkins, and Morton Parker, an aspiring political candidate for Governor in Texas, who once found himself in a love triangle with Parks and a woman named Kathy Scott. The narrative delves into themes of social injustice, political activism, and the intricacies of human relationships.

James uses wit and a satirical tone to critique his era's societal issues. He also parodies the detective genre, primarily through the competitive and contrasting styles of Gideon and Fisher.

The novel's unexpected and ingenious resolution features a clever twist that challenges readers' assumptions and showcases Sidney St. James' mastery of the genre. "The Final Curtain Call" is a pivotal work in detective fiction and provides insightful commentary on Austin, Texas's political landscape.

The novel stands out for its innovative plot, memorable characters, and significant contribution to detective fiction.