This story delivers a compelling blend of mystery and noir, bringing Lou Ryan into a complex web of crimes and personal connections. The gritty atmosphere of the speakeasy and the urban backdrop of Chicago are vividly depicted, adding authenticity to the setting. The narrative is tense, with well-paced action sequences. Lou's hard-boiled detective persona shines through, especially in his interactions with other characters. The integration of a family element through Gloria and her brother adds nuance, makes the stakes personal and the resolution more impactful.

To further enrich the narrative, I'd suggest developing the secondary characters more fully (particularly the antagonists) to provide clearer motivations and make their actions more impactful. Additionally, exploring the psychological complexities of the characters involved in the crimes could offer deeper insights into their behaviors and choices, I think. Simplifying some of the plot twists could help maintain clarity and focus, ensuring that each narrative thread has enough space to be properly explored and resolved.

Overall, this story is a strong addition to the Lou Ryan series, marked by its sharp dialogue, effective character development, and a well-constructed plot that keeps the reader engaged from start to finish. I'm a huge fan of the noir genre and this Lou Ryan series has been a real joy to read.