Allie Santos' What Hides in the Shadows is a compelling entry into the burgeoning genre of dark, "why choose" monster romance. This novel deftly combines elements of horror, romance, and fantasy to create a narrative that is as thrilling as it is emotionally resonant. For readers who are drawn to stories that explore the darker sides of love and desire, Santos offers a tale that is both provocative and deeply engaging.

The central theme of the novel revolves around the idea of choice—or the lack thereof—in matters of the heart. The protagonist finds herself entangled in a web of complex relationships with multiple monstrous entities, each representing different facets of darkness and desire. This "why choose" aspect is a hallmark of the genre, where the protagonist is not forced to choose a single romantic partner but instead navigates the complexities of multiple relationships. Santos handles this theme with a deft touch, exploring the nuances of consent, autonomy, and the nature of love in a way that feels both fresh and deeply relevant.

Character development is one of the novel's strongest suits. The protagonist is a well-rounded character whose journey is both personal and universal. Her interactions with the various monsters she encounters are not just about romance but also about self-discovery and empowerment. Each monster is meticulously crafted, with distinct personalities and backstories that add depth to the narrative. Santos excels at creating characters that are not merely archetypes but fully realized beings with their own desires, fears, and motivations.

The monsters in What Hides in the Shadows are not the typical creatures of horror. Instead, they are complex beings that challenge the protagonist's—and the reader's—preconceived notions of what it means to be monstrous. This subversion of traditional monster tropes is one of the novel's most intriguing aspects. Santos invites readers to question the boundaries between human and monster, exploring themes of otherness and acceptance in a way that is both thought-provoking and emotionally resonant.

In terms of narrative structure, the novel is well-paced, with a balance of action, romance, and introspection that keeps the reader engaged from start to finish. Santos' writing is both evocative and accessible, with a lyrical quality that enhances the novel's dark, atmospheric tone. The world-building is particularly noteworthy, with a richly imagined setting that feels both familiar and otherworldly. This attention to detail helps to immerse the reader in the story, making the fantastical elements feel grounded and believable.

Comparatively, What Hides in the Shadows stands out in the genre for its nuanced exploration of themes and its complex character dynamics. While it shares similarities with works by authors like Sarah J. Maas and Laura Thalassa, Santos' novel distinguishes itself with its focus on the psychological and emotional aspects of its characters' journeys. The novel's exploration of the darker sides of love and desire is reminiscent of Maas' A Court of Thorns and Roses series, while its subversion of monster tropes echoes Thalassa's The Bargainer series. However, Santos' unique voice and perspective make What Hides in the Shadows a standout work in its own right.

Overall, What Hides in the Shadows is a captivating read that will appeal to fans of dark romance and fantasy. Its exploration of complex themes, combined with its richly developed characters and immersive world-building, make it a novel that lingers in the mind long after the final page is turned. For readers looking for a story that challenges conventions and delves into the depths of love and desire, Allie Santos' latest offering is not to be missed.

In conclusion, What Hides in the Shadows is a masterful blend of romance, horror, and fantasy that offers a fresh take on the monster romance genre. Its exploration of themes such as choice, autonomy, and the nature of love is both timely and timeless, making it a novel that resonates on multiple levels. With its compelling characters and evocative writing, Santos has crafted a story that is as thought-provoking as it is entertaining. Whether you're a longtime fan of the genre or a newcomer looking for something different, this novel is sure to leave a lasting impression.