What if I Told You by Susan Renee is an intriguing exploration of the complexities of human relationships, choice, and consequence. The novel navigates the life of Emma Carter, who finds herself at the crossroads of her existence, propelled by an unusual proposition that promises to untangle her from her monotonous life but also threatens the very fabric of her reality.

The book opens with Emma, a middle-aged, married woman, who leads a life marked by routine and predictability. She is faced with a substantial moral dilemma when an old friend presents her with an opportunity that is both exhilarating and morally ambiguous. The narrative skilfully intertwines the past and the present, shedding light on Emma's relationships and the decisions that have steered her to her current predicament.

Susan Renee impresses with her masterful character development; Emma is portrayed with depth and authenticity. The inner turmoil and emotional conflicts she experiences are palpable and engage the reader on a psychological level. The author uses a rich, descriptive style that enhances the introspective nature of the story. Renee's sharp prose and meticulous attention to emotional detail immerse the reader into Emma's world, making her dilemmas and emotional battles their own.

The other characters in the novel, from Emma’s stoic husband to her dynamic friend Lara, are well-rounded and contribute significantly to the unfolding drama. Each character is beautifully fleshed out, having their own voices and backstories that make them memorable. Lara, in particular, serves as a catalyst for change in Emma’s life; her boldness and complexity add a compelling layer to the storyline. The dynamics between Emma and Lara are particularly captivating, filled with a tension that drives much of the narrative forward.

Thematic depth is one of the novel's strongest points. Renee tackles themes of fidelity, happiness, and the allure of the road not taken with finesse. Through Emma’s eyes, we explore the sometimes-blurred line between right and wrong, and the realization that life is often more about the choices we make than the circumstances that befall us. The theme of choice and its repercussions is echoed throughout the book, making the reader ponder their own life decisions.

Structurally, What if I Told You maintains a steady pace, balanced by moments of intense emotional revelations and quieter, introspective segments. Susan Renee uses flashbacks not just as a narrative tool but as a means to enrich the reader's understanding of her characters. This nonlinear narrative structure may require readers to pay close attention, but the payoff is immensely satisfying as it adds to the depth of the narrative and the complexity of its characters.

The dialogue in the book is another high point, realistic and sharp. It serves as a robust vehicle for character development and plot advancement. Dialogues between Emma and her husband are particularly poignant, filled with unspoken words and suppressed feelings that hint at years of marital inertia. This subtlety in communication is a testament to Renee’s skill as a writer, showcasing her ability to convey more in what is not said than in the overt expressions of her characters.

However, it’s not without its minor flaws. Some readers might find the initial setup of the story a bit slow, and the intertwining timelines can occasionally become confusing. Nonetheless, these are minor issues in a narrative that is overall compelling and thought-provoking.

The conclusion of the novel is both surprising and satisfying, tying up the numerous thematic threads in a way that is neither contrived nor predictable. It prompts a reflection on the part of the reader, encouraging a deeper consideration of the 'what ifs' in their own lives.

In conclusion, What if I Told You by Susan Renee is a compelling literary piece that marvelously weaves themes of choice, destiny, and the complexities of human relationships into a cohesive, engaging narrative. With its rich character development, poignant themes, and eloquent prose, it stands as a profound commentary on life’s invariable complexity and the human condition. This book is a compelling read for anyone who enjoys psychological drama layered with moral intricacies and is a testament to the enduring power of choice and change.