Those Two Words by Ronnie Mathews is a transformative novel that bravely tackles the complexities of life's unexpected moments, the depth of human emotions, and the power of words left unsaid. Through an intricate weaving of narratives and sharp, poignant prose, Mathews delivers a story that not only captivates but also offers a profound exploration of love, loss, and the irreversible changes brought about by simple phrases uttered in fleeting seconds.

The book begins with its protagonist, Emily Hart, a vibrant character with a life seemingly filled with completeness and joy. However, a sudden shift occurs with the introduction of "those two words," words that remain cleverly undisclosed by Mathews until the opportune moment. This narrative style creates a suspense that holds the reader's attention tightly, reflecting the suspense and uncertainty that underpins Emily’s own journey. Beyond just a plot device, these words become a central theme that challenges the characters and the reader to contemplate the weight of spoken and unspoken language in shaping our destinies.

With meticulous character development, Mathews paints Emily as relatable and profoundly human. Her responses to life-altering events are layered with a realistic portrayal of resilience and vulnerability. Supporting characters are equally well-crafted, from the steadfast best friend who offers a shoulder in the darkest times to the estranged family member whose motivations are nuanced and heartbreakingly plausible. The dynamics among these characters provide a rich tapestry of interactions that are at once unique and universally understandable, reflecting the author’s keen insight into human relationships and conflicts.

Set against the backdrop of a small American town, the setting of the novel serves as both a mirror and a contrast to the turmoil within Emily. The serene, almost idyllic environment clashes with her internal chaos, highlighting her sense of isolation and turmoil. Mathews's descriptions are vividly lush, and her attention to sensory details immerses the reader into the very fabric of Emily’s world, making the town an almost sentient entity that reacts to the dramatic arcs of the story.

Structurally, the novel’s pacing is deliberate, with Mathews controlling the flow of information and emotion in a way that perfectly matches the development of her characters. This manipulation of pacing is not just a narrative strategy but an echo of the book’s central themes about time and timing. The author weaves flashbacks and current events with a proficiency that adds layers of depth to the story, slowly unfolding mysteries and revelations that keep the reader deeply engaged and emotionally invested.

One of the most compelling aspects of Those Two Words is Mathews's reflective and philosophical writing style. Throughout the novel, she poses compelling questions about the nature of fate and the ability of humans to steer their paths amidst unforeseen challenges. Her prose is often lyrical but never loses the grounded, raw edge that such a story demands. This balance is where Mathews shines, combining beautiful language with gritty story elements that touch on darker themes of grief and regret.

Critically, while the novel is mostly a triumph, certain plot twists might feel slightly contrived, particularly towards the climax. However, these moments are mostly overshadowed by the overall emotional and intellectual resonance of the story. Mathews doesn’t shy away from the painful aspects of her narrative, addressing each twist with the seriousness it deserves, propelling the characters towards growth and sometimes, unexpected resolution.

In conclusion, Those Two Words by Ronnie Mathews is a powerful narrative that explores the essence of human experience — our hopes, fears, and the myriad ways in which our lives can be altered by the simplest expressions of language. It is a novel that will likely resonate with anyone who has faced the precipice of change and found themselves haunted by the echo of what was said or left unspoken. Mathews not only tells a compelling story but also invites the reader to reflect on their personal intersections of choice, chance, and destiny.

For those who appreciate novels that blend lyrical prose with a keen exploration of the human psyche, Those Two Words is a must-read. It is a testament to the power of words and the indelible impact they have on the fabric of our lives.