The Echo Protocol

The Echo Protocol

Former criminal profiler Elise Hartmann walked away from profiling murderers—until a single puzzle pulls her back into a dangerous game only she can solve. Years after a botched case, she designs logic puzzles in peaceful seclusion, until a mysterious package arrives with a riddle only she could crack and a photograph that should not exist. The child she failed to save may still be alive, and a shadowy group known as Echo is pulling the strings.

• Intriguing suspense that tightens with every clue
• Smart, puzzle-driven thriller perfect for fans of methodical whodunits
• Atmospheric tension as Elise confronts a dangerous recruitment

Key details
Author: Horsecreek Digital
Genre: Mystery / Thriller
Format: Digital/Print available
Publication: The Echo Protocol