Every Version of You by Sloan Spencer is a mesmerizing exploration of love, identity, and technology that invites readers into a near-future universe where virtual reality has evolved to become almost indistinguishable from real life. Through the story of its protagonists, Tao and Grace, Spencer crafts a poignant narrative that not only thrills but also poses profound questions about the essence of self in the digital age.

The novel opens as Tao, a neuroengineer, and Grace, a climate scientist, grapple with the realities of a world where escapism into virtual dimensions has become the norm. Humanity has the technology to completely immerse itself in alternative realities where every sensory experience can be simulated to perfection. Tao and Grace, once passionately in love and now evolving in different directions, must decide what this means for their relationship. Is the version of your partner that you interact with in a virtual world as genuine as the one next to you in bed?

Spencer’s prose is lucid and compelling, blending technical jargon with poetic observations about human nature, making complex scientific concepts accessible and engaging. The narrative deftly alternates between Tao and Grace's perspectives, providing a dual viewpoint on their evolving relationship as they navigate through real and virtual challenges. This shifting perspective is a key strength of the book; it allows an intimate portrayal of their deepest insecurities and aspirations.

The setting of a not-too-distant future is meticulously built. Spencer paints a world that is at once wondrous and believable. The technological advancements, such as AI companions and environmental control systems, are logically extrapolated from current trends, grounding the fantastical elements in a convincing reality. Details about societal changes and ethical dilemmas, like the regulation of virtual experiences and the environmental implications of widespread tech dependency, add layers of complexity to the story. These details do not merely serve as a backdrop but actively shape the characters' experiences and choices.

At its core, the book is a deep dive into the psychology of self-perception and the concept of authenticity. Spencer raises haunting questions: If you can choose to be anyone in a virtual world, who is the real you? Can a digital footprint ever truly capture what it means to be human? The narrative does not shy away from these challenging questions but instead embraces them, weaving them through the personal trials and growth of Tao and Grace. Their journey of self-discovery and mutual understanding, mirrored by their experiences in both the real and virtual worlds, forms the emotional backbone of the novel.

Every Version of You is also commendable for its nuanced portrayal of emotional intimacy and relationship dynamics. Spencer’s depiction of Tao and Grace’s relationship — fraught with misunderstanding, evolving desires, and the search for common ground — is textured and real. The characters are well-developed, with backstories and personalities that make them feel like living, breathing people facing genuine dilemmas. Their interactions are infused with a mix of tenderness and tension, highlighting their struggle to align their aspirations with the changing realities of their world.

Criticisms of the book might center on its pacing, which may feel slow to some readers, especially in the middle portion where philosophical musings sometimes overshadow the forward movement of the plot. However, these reflections are crucial to the thematic depth of the story and contribute significantly to the novel's ultimate impact.

In conclusion, Sloan Spencer’s Every Version of You is a thought-provoking and thoroughly engaging read that masterfully intertwines elements of science fiction with deep emotional and ethical inquiries. It is a telling examination of our increasingly digital existence and a compelling narrative about maintaining love and identity within it. Perfect for those who enjoy speculative fiction with a heavy dose of character introspection and a keen look at what future technologies might hold for humanity. This novel does not just entertain but also challenges its readers to think about what it means to be truly oneself in a world where every aspect of life can be digitized and replicated.