Michelle Diener's Return Ticket is a gripping historical mystery that transports readers to the atmospheric streets of 1963 London, shrouded in a literal and metaphorical fog. The novel deftly combines elements of suspense, romance, and historical intrigue, making it a compelling read for fans of period mysteries and crime fiction.

The story opens with a vivid depiction of London engulfed in a thick, impenetrable smog, setting the stage for a chilling narrative. This atmospheric backdrop is not just a setting but a character in itself, providing the perfect cover for a killer who prowls the streets. The smog, a recurring motif throughout the novel, symbolizes the obscured truths and hidden dangers lurking in the city, enhancing the tension and suspense.

At the heart of the story are Gabriella Farnsworth, a traffic warden with a knack for uncovering secrets, and her boyfriend, Detective Sergeant James Archer. Their relationship is one of the novel's strengths, providing a personal dimension to the unfolding mystery. Gabriella's role as a traffic warden is an interesting choice, allowing her to interact with a diverse array of characters and gather crucial information from the streets. Her resourcefulness and determination make her a compelling protagonist, while her relationship with James adds depth to her character.

James Archer, on the other hand, is portrayed as a dedicated detective, deeply committed to solving the case. His growing anxiety as the smog descends over the city is palpable, reflecting the urgency and danger of their mission. The dynamic between Gabriella and James is well-crafted, with their professional and personal lives intertwining seamlessly. Their collaboration is not only central to the plot but also highlights themes of trust and partnership.

The novel's plot is intricately woven, with Diener skillfully unraveling the mystery through a series of clues and revelations. The discovery of a body by three young boys sets off a chain of events that leads James and Gabriella on a journey back in time to the Blitz, another period when London was cloaked in darkness. This historical connection adds a layer of complexity to the narrative, as the characters must piece together past and present to catch the killer.

Diener's exploration of the Blitz and its aftermath is both poignant and insightful. The novel delves into the psychological scars left by the war, examining how past traumas can resurface and manifest in unexpected ways. This theme of history repeating itself is central to the story, underscoring the idea that the past is never truly gone and can have a profound impact on the present.

The supporting cast of characters is equally well-developed, each contributing to the richness of the narrative. Gabriella's diverse contacts on the street provide valuable insights and add authenticity to the depiction of 1960s London. Diener captures the essence of the city during this period, from its bustling streets to its hidden corners, creating a vivid and immersive setting.

In terms of pacing, Return Ticket strikes a fine balance between action and introspection. The tension builds steadily, with each new discovery adding to the suspense. Diener's writing is both evocative and precise, capturing the mood and atmosphere of the era while keeping the reader engaged with the unfolding mystery.

Comparatively, Return Ticket shares similarities with other historical mysteries such as Jacqueline Winspear's Maisie Dobbs series and Susan Elia MacNeal's Maggie Hope mysteries. Like these authors, Diener combines historical detail with a strong female protagonist, creating a narrative that is both entertaining and thought-provoking. However, Diener's focus on the interplay between past and present, and the psychological impact of historical events, sets her work apart, offering a unique perspective on the genre.

Overall, Return Ticket is a masterful blend of history, mystery, and romance, with well-drawn characters and a compelling plot. Michelle Diener has crafted a novel that is both a thrilling page-turner and a thoughtful exploration of the enduring impact of the past. For readers who enjoy historical mysteries with depth and substance, Return Ticket is a journey worth taking.