The Echo Protocol
(Paperback)
M M Crusinberry,
Independently Published (Publisher)
Published
2026
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Ships within 1-2 days
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(Paperback)
M M Crusinberry,
Independently Published (Publisher)
Ships within 1-2 days
The system is gone.
The world is free.
Harper is alive.
But the silence isn't peace.
A message appears with no sender.
A voice whispers in her mind.
The enemy she destroyed is still inside her.
Now Harper must fight a war no one else can see -
before the system returns and the world becomes a prison again.
A standalone sci-fi thriller with a killer twist and a high-stakes finale.
