L.B. Black's What Is Dark Within Me is a compelling exploration of magic, mystery, and moral ambiguity, wrapped in a narrative that is as enchanting as it is unsettling. At its core, the novel is a dark fantasy that delves into the complexities of power, love, and the sacrifices one makes in the pursuit of truth. It is a story that captivates the reader from the very first page, drawing them into a world where the lines between good and evil are blurred, and every choice comes with a price.

The protagonist, Alejandra Ruiz, is a young witch whose life is turned upside down by the mysterious disappearance of her best friend, Violet. Alejandra's journey is one of desperation and determination, as she is willing to go to any lengths to uncover the truth. Her decision to strike a deal with the Knowing One, a character shrouded in enigma and danger, sets the stage for a narrative that is both thrilling and thought-provoking. The Knowing One, described as the Prince of Lies and Shadows, is a fascinating character whose motives and intentions are as murky as the shadows he commands. The dynamic between Alejandra and the Knowing One is one of the novel's most intriguing aspects, as it explores themes of trust, manipulation, and the seductive nature of power.

One of the novel's strengths is its character development. Alejandra is a well-crafted protagonist whose internal struggles are portrayed with depth and nuance. Her journey is not just a quest to find her friend but also a journey of self-discovery. As she delves deeper into the mystery of Violet's disappearance, Alejandra is forced to confront her own darkness and the potential for corruption that lies within her. This internal conflict is mirrored in her interactions with the Knowing One, whose own complexity adds layers to the narrative. The chemistry between these two characters is palpable, and their relationship is a dance of danger and desire that keeps the reader engaged.

The novel's themes are both timeless and timely. The exploration of power and its consequences is a central theme, as Alejandra grapples with the cost of the power she seeks. The deal she makes with the Knowing One requires the heart of the next person who falls in love with her, a price that raises questions about the nature of love, sacrifice, and morality. This theme is further explored through the novel's secondary characters, who each have their own motivations and secrets. The alliances and betrayals that unfold throughout the story add depth to the narrative and keep the reader guessing.

In terms of world-building, L.B. Black has crafted a setting that is both vivid and atmospheric. The realm of the Knowing One is a place of shadows and secrets, a reflection of the character himself. The descriptions are rich and immersive, drawing the reader into a world that is both familiar and fantastical. The magic system is well-developed and integral to the plot, adding an extra layer of intrigue to the story.

Comparatively, What Is Dark Within Me shares thematic similarities with other works in the dark fantasy genre, such as Leigh Bardugo's Shadow and Bone series and V.E. Schwab's Shades of Magic trilogy. Like these works, Black's novel explores the seductive nature of power and the moral dilemmas faced by those who wield it. However, Black's unique voice and the novel's focus on the personal journey of its protagonist set it apart, offering a fresh perspective on familiar themes.

The novel's pacing is well-balanced, with a plot that unfolds at a steady pace, keeping the reader engaged without feeling rushed. The tension builds gradually, culminating in a climax that is both satisfying and thought-provoking. The resolution of the mystery surrounding Violet's disappearance is handled deftly, with twists and turns that keep the reader on their toes.

Overall, What Is Dark Within Me is a captivating read that will appeal to fans of dark fantasy and character-driven narratives. L.B. Black has crafted a story that is both entertaining and thought-provoking, with themes that resonate long after the final page is turned. The novel's exploration of power, love, and sacrifice is both timeless and relevant, making it a standout addition to the genre.

In conclusion, L.B. Black's What Is Dark Within Me is a masterful blend of mystery, magic, and moral complexity. It is a novel that challenges the reader to consider the cost of power and the nature of love, all while delivering a story that is as engaging as it is thought-provoking. For those seeking a dark and immersive fantasy with rich character development and a compelling plot, this novel is a must-read.