The Zero Variable: In a World Ruled by Numbers, the Greatest Threat is a Man Who Cannot Be Counted.

Everything has a price. Everyone has a number. And the Hollow Compact never forgives a debt.

In the towering, hyper-structured city of Varek's Mouth, human worth is dictated by the Ledger—an omnipotent metaphysical system that tracks every soul. For Sybil Snow, a mid-tier enforcer for the ruthless Ironveil Guild, the numbers are her shield. Haunted by a devastating betrayal in her past, she has transformed herself into the perfect, unfeeling weapon of the Towers, crushing default debtors without hesitation to maintain her own rank and survival.

But during a routine extraction deep within the squalid, lightless warrens of the Unscored Districts, Sybil encounters an impossibility.

A man named Orion.

He has no aura. He has no stats. He possesses no numerical rank. To the flawless arithmetic of the Hollow Compact, he is an absolute void—a shattered paradigm that passively defies the laws of their reality. When the high command orders Sybil to capture the anomaly for a fatal vivisection to protect the system's perfection, the cold logic she has relied on for seven years begins to violently unravel.

The Zero Variable is a breathtakingly dark dystopian LitRPG and psychological thriller that questions the very nature of humanity and power. Andre Reaves launches the epic The Debt Between Teeth series with a deeply atmospheric, morally complex tale of systemic oppression, unspoken connection, and the terrifying rebellion of simply existing outside the cage.