"Daddy!" by Carolyn Faulkner is a book that delves into the complexities of a unique and controversial romance sub-genre, often known as "Daddy Dom/little girl" (DD/lg) dynamics, set within a framework that challenges conventional boundaries of adult relationships. This novel, emphatically not for everyone given its explicit content and particular theme, explores the psychological and emotional aspects of its characters while immersed in power exchange and age play elements.

The story introduces us to Amy, a young woman with hidden traumas and a deep-seated need for a type of care and control most conventional relationships don’t provide. Enter Richard, an older, authoritative man with a nurturing side, who is drawn to Amy's vulnerability and complexity. The core of Faulkner's narrative rests on their evolving relationship, which is steeped heavily in DD/lg dynamics—a form of BDSM that emphasizes a consensual power differential, where one partner assumes a caregiving, "Daddy" role, and the other, a "little" role, which can involve child-like demeanors and behaviors.

Faulkner's portrayal of Richard and Amy’s relationship is nuanced and intricate. It's clear from the outset that the bond between them is built not just on mutual attraction but on a profound, emotionally symbiotic need. Richard offers the structure, guidance, and protection Amy craves, and in return, she submits to his authority and derives comfort from his paternal manner. Faulkner does not shy away from depicting this exchange in ways that are both intensely intimate and, at times, uncomfortable. The sexual elements of the book are explicit, with scenes and language that may disturb some readers while appealing to others for their frankness and intensity.

One of the strengths of this book is its in-depth exploration of consent and psychological insight. Faulkner spends significant time delving into Amy’s psyche, revealing her thoughts and motivations, which helps frame her choices and desires in a context that goes beyond mere sexual gratification. Similarly, Richard is portrayed with a complexity that avoids the common pitfall of reducing the "Daddy" figure to a mere caricature. Instead, he is presented as a multifaceted character capable of immense tenderness and strictness, embodying the dual nature that such a dynamic requires.

However, the book might be challenging for readers unfamiliar with or uncomfortable with the age play aspect, which includes behaviors and language deliberately reminiscent of a younger person. These elements are essential in DD/lg relationships, emphasized throughout "Daddy!" but might not sit well with everyone. While Faulkner is careful to clarify the full, enthusiastic consent of all parties involved, and the adult nature of the relationship, some may find it provocative or unsettling.

Moreover, Faulkner's writing style supports the themes well—her language is both evocative and deliberate, meant to provoke strong feelings from the reader. The visceral reactions expected are a testament to her skillful, albeit bold narrative choices. The development of the plot, primarily driven by the emotional developments and difficulties in Amy and Richard’s relationship, does well to evoke a sense of realism despite the unconventional premise. The author champions a deeper understanding of a lifestyle that many may not be familiar with, advocating for the respect and legitimacy of consensual choices in adult relationships.

Critically, the book also addresses the complexities involved in healing from past traumas through unconventional means. Amy’s character growth, viewed through the lens of her relationship with Richard, posits interesting questions about the paths to emotional recovery and fulfillment. The book suggests that unconventional approaches can be valid and healing, provided they are executed within the bounds of informed consent, respect, and genuine care.

In conclusion, "Daddy!" by Carolyn Faulkner is a provocative, daring piece of fiction that grapples with complex themes under the guise of a DD/lg romance. It’s a visceral read that demands an open mind and a willingness to explore the psychological depth of its characters. While it certainly won’t appeal to all—nor does it aim to—those with an interest in the dynamics of power exchange relationships, psychological exploration, and erotic intensity may find it a compelling and thought-provoking read.