Laura Leblanc 
The Gravity of Us [EPUB ebook] 

The Earth’s rhythm is broken. Days and nights stretch into an unsettling, perpetual twilight, a haunting symphony of fading light and encroaching shadow.  As ecosystems collapse and the human psyche frays, three souls find their destinies intertwined with the fate of the planet itself.
Dr. Susan Knight, a NASA astrophysicist haunted by a past mission’s failure, confronts a terrifying new reality: Earth’s rotation is slowing.  Driven by a fierce intellect and the weight of regret, she races to find a solution, questioning whether this cosmic anomaly is a natural phenomenon or humanity’s final, reckless act.
Thousands of miles away, in a valley where sunlight stubbornly clings, young Elara Vance discovers a terrifying gift. Her music, once a personal solace, now holds sway over gravity itself, a power as unpredictable as it is wondrous.  Torn between fear and fascination, Elara must learn to control this force before it consumes her, guided by her grandfather’s whispers of ancient harmonies woven into the fabric of the universe.
Meanwhile, Zara Keller, a pragmatic leader hardened by loss, guides her nomadic tribe, the Duskwalkers, across the fractured landscapes of a dying Earth.  Following the ever-shifting terminator line, they scavenge for survival, their hope pinned on the ruins of a forgotten civilization, a place where Zara believes the secrets of salvation lie buried.
As the planet’s rotation falters, Susan’s scientific quest collides with Elara’s intuitive connection to Earth’s gravitational song.  Drawn together by a cryptic message, their paths converge with Zara’s desperate search, leading them to a hidden nexus of energy deep within the Earth’s core—the source of the planet’s decay, and perhaps, its salvation.
Their journey into the heart of the Earth is fraught with peril.  They face not only the physical challenges of a dying world but also the psychological toll of the unending twilight, a creeping despair that threatens to unravel their fragile alliance.  Within the ruins, they discover that the ancient civilization Zara sought was not technologically advanced but deeply attuned to Earth’s natural rhythms, their knowledge preserved in cryptic symbols and musical notations.
At the nexus, a swirling vortex of energy, Susan’s scientific understanding and Elara’s musical intuition must harmonize.  With Zara’s guidance, Elara channels her music into the planet’s core, her melodies resonating with the Earth’s gravitational song, a symphony of change that could restore balance or unleash devastation. In a climactic moment, as the twilight deepens and the planet shudders, they face a choice that will determine the fate of Earth and the future of humanity. Can they harness the power of the nexus before the music fades and the world is plunged into eternal darkness?