Creatures that Breathe, authored by M.L. Chambers, is a profound piece of literary fiction engulfed in the essence of existential meanderings and rich character studies. Set against the backdrop of a seemingly mundane world that pulses with an undercurrent of mystical realism, Chambers unfurls a narrative that probes deep into the complexities of human condition, mortality, and the subtle intertwining of fear and desire.

The story introduces us to Eleanor, a protagonist whose life at first glance appears unremarkably simple but is riddled with psychological and metaphysical puzzles. Eleanor, alongside a supporting cast of intricately developed characters, navigates through a series of transformative events that reveal not only their inner life but the broader philosophical conundrums of the human experience. Chambers employs Eleanor as a vehicle to explore broader themes such as isolation, identity, and the relentless quest for purpose in an often inexplicable world.

What sets Creatures that Breathe apart is the eloquent prose and the seamless blend of everyday realism with the ethereal. Chambers crafts each sentence with acute precision, ensuring that the language itself morphs into an almost palpable element of the storytelling. One of the standout features of Chambers’ writing is her ability to weave existential queries into the dialogue and the narrative without making it feel forced or pedantic. This nuanced approach helps the philosophical underpinnings of the novel emerge organically, prompting readers to ponder alongside the characters.

The narrative structure of Creatures that Breathe deserves a special mention. It doesn’t follow a traditional linear path but flits back and forth in time. This non-linear approach might be disorienting to some readers, but it brilliantly mirrors the internal tumult and fragmented memories of the characters, especially Eleanor. This style serves as a metaphor for how past traumas and joys bleed into present realities, molding one’s consciousness and responses to new events.

Chambers also excels in character development. Each character in this book, from the main ensemble to those who appear briefly, is drawn with depth and authenticity. Their dialogues do not merely serve the plot but reveal their personalities and their evolving philosophies of life. The interaction between Eleanor and her enigmatic neighbor, Thomas, is particularly compelling. Their conversations, loaded with metaphor and symbolism, highlight Chambers' skill in using dialogue as a tool for both character development and thematic exploration.

Amidst these strengths, however, the novel’s pacing can sometimes feel uneven. Certain sections of the book delve deeply into internal monologues and philosophical ponderings that, while intellectually stimulating, slow down the narrative progression. This may test the patience of readers who prefer a more plot-driven or action-oriented story. However, those appreciative of a reflective and cerebral approach to storytelling will find this to be a rewarding aspect of Chambers' narrative style.

The author’s integration of surreal elements is another intriguing aspect of Creatures that Breathe. These elements are subtly introduced in ways that might initially confuse the reader but eventually make profound sense in the thematic tapestry of the narrative. For instance, the recurring motif of water, which at various points in the story becomes a symbol of life, freedom, danger, and rebirth. This symbolic layering adds to the depth of the narrative, making the book ripe for re-reading and further analysis.

In terms of themes, Chambers never shies away from the dark and uncomfortable corners of human psychology. The exploration of death, not just as an event but as a profound influence on living, resonates throughout the novel. The writer’s portrayal of Eleanor’s confrontation with her mortality and her complex relationship with life and death encapsulates the core essence of the book. It is raw, unsettling, but ultimately enlightening, showcasing Chambers' ability to tackle heavy themes with sensitivity and insight.

In conclusion, Creatures that Breathe by M.L. Chambers is a thought-provoking and intricately crafted novel that dares to delve into deep philosophical issues while maintaining a strong emotional core. It is a testament to Chambers’ prowess as a storyteller and philosopher-poet who can navigate both the simple and the complex with equal finesse. Though its meandering pace and dense narrative might not cater to all, for those drawn to novels that challenge both the heart and the mind, Creatures that Breathe is a compelling and enriching read. Certainly, it is a literary journey worth taking for those who seek to explore the profound depths of narrative fiction.