Devil May Cry by Delaine Smith plunges the reader into a riveting concoction of urban fantasy, thrilling action, and emotional depth that is not commonly found in the genre. From its engaging opening to its breathtaking climax, the book serves as a definitive example of how to blend fantastical elements with real-world sensibilities in a narrative that is both captivating and thought-provoking.

The story follows the protagonist, Michael St. Clair, a man with a mysterious past and a present haunted by demons both literal and metaphorical. A former detective turned private investigator in the sultry streets of New Orleans, Michael finds himself pulled into a labyrinth of supernatural occurrences when a seemingly mundane case turns out to be anything but. The narrative beautifully captures the essence of New Orleans – its vibrant culture, deep-rooted superstitions, and dark underbelly, making the city itself a vital, pulsating character in the tale.

Delaine Smith’s prose is both sharp and evocative. She manages to construct vivid images with her words, painting scenes soaked in shadow and light, which draws readers deeper into the world she has created. Her portrayal of Michael is executed with meticulous attention to emotional detail – he is a character formed through contradictions, shaped by his regrets, and driven by a desire for redemption that he believes unattainable.

The supernatural elements in the book are innovative and well-integrated. Smith introduces creatures that are both fantastical and terrifying, yet they never feel out of place in the gritty reality she constructs. The lore is rich and appears unforced, allowing new rules and characters to add layers to the story in a way that feels organic and intriguing. Particularly of note is the mythos surrounding the "Night Crawlers", mythical beings said to devour lost souls, which Smith intertwines seamlessly with voodoo culture.

However, Devil May Cry shines brightest in its exploration of themes such as guilt, redemption, and the nature of evil. Through Michael, the novel probes deep questions about humanity and what it means to be monstrous. Smith uses the character's inner turmoil and external challenges to explore these themes, employing a variety of other characters, each contributing different perspectives to the central questions of the book. This thematic depth lends the otherwise fantastical story a profound sense of realism and urgency.

The pacing of the book is like the steady beat of a drum, with moments of exhilarating action interspersed with quieter, introspective segments that allow the reader to breathe and reflect alongside the protagonist. The book’s climax, a masterfully orchestrated confrontation that fuses supernatural spectacle with heartfelt drama, is both satisfying and heart-wrenching.

One slight critique could be directed toward the book’s use of dialogue in some sections, where the exchanges between characters can feel slightly stilted or too on-the-nose with its exposition. However, this is a minor quibble in what is otherwise stellar narrative craftsmanship.

Moreover, Delaine Smith’s inclusivity in character representation is commendable. The diverse cast of characters feels authentic and substantial, each with their distinct voice and background that contribute meaningfully to the story. This diversity enhances the tapestry of New Orleans portrayed in the book, highlighting the city's multicultural heritage and complex social dynamics.

In conclusion, Devil May Cry by Delaine Smith is a powerhouse of a novel. It brilliantly melds elements of mystery, horror, and a touch of romance into a cohesive whole that is not only entertaining but also deeply resonant. It’s a narrative that hooks you from the first page and doesn’t let go, even after the last word has been savored. For lovers of dark, brooding hero narratives, richly constructed worlds, and stories that challenge as much as they captivate, this book is a must-read. Delaine Smith has proven herself a formidable talent in the sphere of urban fantasy, and Devil May Cry is a testament to her skill and imagination.