A Neanderthal’s 47,000-year-old remains are discovered in Spain. That in itself isn’t shocking—but the robotic drone lying next to her skeleton certainly is. Lincoln Woodhouse has some serious explaining to do.
The drone is unmistakably one of Lincoln’s own models, deployed to the past for environmental research. The catch? This drone shouldn’t exist in his timeline at all. Everyone knows sending technology into the past risks creating alternate realities—and now the consequences are staring him in the face.
Lincoln is ordered to travel back in time himself, a feat no human has ever attempted. Alongside his team, he plunges into a prehistoric world filled with savage creatures and dangerous landscapes, where survival is far from guaranteed.
Amid the chaos, Lincoln meets Skyra, a fierce hunter and extraordinary fighter. She isn’t human—but she may hold the key to the future of mankind.
Obsolete Theorem, the first book in the Across Horizons series, is a thrilling mix of time travel, prehistoric danger, wilderness survival, and unforgettable characters—perfect for fans of high-stakes sci-fi adventure.
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