From Our First, the fourth book in Carrie Ann Ryan’s engaging Promise Me series, is a romance novel that not only tugs at the heartstrings but also incorporates elements of tension and drama to keep the reader thoroughly engaged. In this installation, we meet the characters Nico and Sierra, each carrying their own emotional baggage that adds layers to their burgeoning relationship. As typical of Ryan’s writing, the romance is infused with themes of vulnerability, redemption, and the intrinsic human need for connection.

The narrative begins with Nico, a man grappling with the heavy weight of his past and the pressure to succeed in his professional life. His character is meticulously crafted, displaying a profound depth that makes him palpable to the reader. Sierra, on the other hand, emerges as a resilient and empathetic character whose past relationship woes have left her wary of new bonds. It is the interplay of these two well-drawn characters that forms the crux of the book’s allure.

Ryan’s adept use of dual perspectives enhances the reading experience, allowing an intimate glimpse into the emotional corridors of both protagonists. This narrative style effectively helps to build tension and empathy, drawing the reader closer to the characters with each page turned. The chemistry between Nico and Sierra is palpable, crafted through a mix of poignant backstories and a realistic portrayal of their slow-building trust. The romance unfolds in a manner that is neither rushed nor unrealistic, which makes their connection feel all the more genuine and heartwarming.

The author's strength lies in her ability to weave complex characters into a storyline that is as emotionally engaging as it is entertaining. In From Our First, the emotional dilemmas and personal growth of Nico and Sierra are portrayed with a sensitivity and realism that are often missing in typical romance novels. The dialogues are crisp and carry a depth that echoes the characters’ evolving relationship and individual transformations.

However, while the romantic development forms the story's bedrock, Carrie Ann Ryan does not shy away from introducing elements of suspense and tension. Nico’s struggle with his past and the mysterious elements linked to his family add a layer of intrigue that keeps the narrative engaging beyond the romantic developments. These elements of suspense are well-integrated into the plot, ensuring that the pace does not slacken and that the stakes remain high throughout the story.

Supporting characters in the novel also add richness to the narrative, each adding a nuance to the main storyline. Whether it is the familial interactions that help highlight Nico’s inner turmoil or the friends who stand by Sierra, these characters help in fleshing out the main characters and the story’s world. They provide a broader social context to the protagonist's lives and serve as catalysts in their journey towards each other.

Moreover, Ryan’s prose is smooth and evocative, often filled with descriptions that vividly paint the scenes and emotions. There is a rhythmic quality to her writing that easily sweeps one into the lives of Nico and Sierra, making their joys, pains, and uncertainties palpable. The descriptive quality does not only paint the physical surroundings but also effectively captures the internal landscapes of the characters.

While the novel is largely effective, some readers might find the buildup to the climactic resolution a tad prolonged. However, this is a minor quibble in an otherwise compelling narrative. The balance between romance, personal setbacks, and the eventual triumph of spirit makes From Our First a satisfying read.

In conclusion, From Our First by Carrie Ann Ryan is a compelling addition to the romance genre that will appeal to fans of deep emotional narratives as well as those looking for more than just a conventional love story. With complex characters, an engaging plot, and a balanced mix of romance and tension, this book promises to keep the reader invested from the first page to the last. It’s a testament to Ryan’s prowess in creating a world where emotional stakes are high, and love, despite all odds, reigns supreme.