When a global communications blackout strikes without warning, former emergency pilot Eli Cross receives a single mysterious radio signal repeating cryptic coordinates—and a warning: before dawn. With cities falling silent, electronics failing, and the world descending into chaos, Eli must navigate abandoned highways, collapsing towns, and rogue survivors to uncover the source of the signal. Guided by Mara Vance, a former engineer with knowledge of the anomaly, Eli races against time to deliver a fragile message of hope before the silence adapts and spreads. The Last Signal Before Dawn is a pulse-pounding survival thriller about courage, trust, and the lengths humanity will go to reclaim its voice.
Nicole Castellanos is a storyteller drawn to the edge of the unknown — where science, myth, and human emotion collide. With a background in linguistics and a lifelong fascination with cryptic communication, her work explores how language and memory shape identity. The Obsidian Signal is her debut novel, blending psychological depth with cinematic tension. When she isn’t writing, Nicole can be found exploring coastlines, decoding vintage shortwave broadcasts, or sketching story ideas in storm-weathered notebooks.View all by castellanos nicole
