In the realm of paranormal romance, "The Alpha's Sold Pregnant Mate" by Alexa Griffin claims a distinctive spot with its blend of suspense, romance, and a touch of the supernatural. The novel presents a stirring narrative that explores the complexities of fate, freedom, and love through the experiences of its protagonists. The fabric of the story is woven with themes of survival and resilience, tested by the profundity of the supernatural elements that define the characters' lives.

The book introduces us to Lyla, a young woman who finds herself in a harrowing situation after being sold to an Alpha wolf, Rowan, who is oblivious to her pregnancy. The idea of being bought and sold injects an initial discomfort which is critical for setting the tone of Lyla’s daunting journey ahead. Despite the ostensibly clichéd premise of an Alpha finding and claiming his mate, Alexa Griffin infuses freshness into the narrative with her character development and the layers of internal and external conflicts they face.

Griffin's portrayal of Lyla is both poignant and empowering. Throughout her ordeal, Lyla’s resilience and determination to protect her unborn child stand as a testament to the strength found in maternal love and the instinct to survive against all odds. Her evolution from a victim of circumstances to a pillar of strength is gradual, believable, and richly detailed, pulling the reader through a spectrum of emotions. The dynamics of her relationship with Alpha Rowan shift intriguingly as he transitions from captor to protector, and eventually, to a lover. This transformation is not without its complications, hinting at the nuanced negotiations of power and vulnerability within their relationship.

Rowan, on the other hand, is crafted with an interesting mix of dominance and decency. His initial ignorance of Lyla's condition and his participation in the dehumanizing act of purchasing a mate are stark markers of his flaws. However, his development through the narrative, where he grapples with his newfound feelings and the revelations about Lyla, add layers to his character that are both infuriating and engaging. The author does well to escape making him a monolithic character, instead painting a portrait of a man caught between the brutish expectations of his culture and his emergent empathetic self.

The world-building in "The Alpha's Sold Pregnant Mate" is commendable. Griffin beautifully constructs a universe where werewolves and humans coexist, each with their distinct societal norms and tensions. The incorporation of werewolf lore and pack dynamics provides a compelling backdrop that enriches the main plot. Notably, the author’s description of the pack’s reaction to Lyla, blending suspicion with a protective instinct, reflects the complex social structures inherent in such tales.

Moreover, Griffin’s prose is fluid and evocative, capable of constructing tense atmospheres and tender moments with equal adeptness. The pacing is brisk, with twists that are well-timed to keep readers on the edge of their seats. However, it is in the quiet moments of introspection and tender exchanges where Griffin’s writing truly shines, allowing the emotional depth of the characters to surface and connect with the reader.

While the novel excels in many areas, it is not without its tropes which might feel overused to some readers of paranormal romances. Elements such as the alpha male, the fated mates, and even the damsel-in-distress are familiar, and their treatments don't always escape predictability. However, the emotional gravity and the development arcs of Lyla and Rowan do much to compensate for these predictable beats.

In conclusion, "The Alpha's Sold Pregnant Mate" by Alexa Griffin stands out as a potent blend of romance, drama, and paranormal intrigue. It challenges the norms of alpha dominance with a story of transformation and redemption that is both heart-wrenching and heartwarming. For readers looking for an emotional rollercoaster set against the backdrop of an intensely imaginative werewolf world, this book promises and delivers engagement and entertainment. Alexa Griffin shows herself to be not only a capable storyteller but one who understands the beats of both the hearts of her characters and her readers.