*The Man in the Queue* by Josephine Tey is a compelling and atmospheric mystery that introduces the thoughtful and unconventional Inspector Alan Grant. The story begins with a shocking murder in the most ordinary of settings—a crowded theatre queue in London—where a man is quietly stabbed in the back and no one sees the killer. As Grant delves into the investigation, he is drawn into a labyrinth of mistaken identities, elusive witnesses, and shifting truths. With Tey’s elegant prose and psychological depth, *The Man in the Queue* is a nuanced and intelligent whodunit that challenges assumptions and subverts expectations, marking a strong debut in the classic detective genre.