A simple transaction involving a stranger's overcoat plunges the Diamond brothers into a lethal conspiracy that threatens their lives. Tim Diamond, a private investigator with more enthusiasm than skill, and his younger brother Nick find themselves targeted by dangerous criminals after a mysterious man is murdered. The narrative follows Nick as he attempts to navigate the escalating peril, relying on his own wits to compensate for his brother's incompetence. The story unfolds through a fast-paced, humorous lens that highlights the absurdity of their situation while maintaining the tension of a classic detective caper.

This work is widely recognized for its clever subversion of traditional detective fiction tropes, appealing to readers who enjoy a blend of humor and suspense. The series is noted for its accessible prose and the dynamic between the two brothers, which serves as the emotional anchor for the chaotic events. Critics often highlight the author's ability to balance slapstick elements with a coherent, engaging mystery plot that keeps the reader guessing. The book remains a staple for those seeking a lighthearted entry into the mystery genre that does not sacrifice narrative momentum.