The Speed of Sound (Speed of Sound Thrillers Book 1)

The Echo Box is a revolutionary new product that has the power to capture and replay never-recorded sounds from any surface or object.

Imagine being able to hear your deceased loved one's voice, or relive a moment in time that was lost forever.

With the Echo Box, you can do just that.

This incredible machine uses acoustic archeology to unlock the secrets of the past and bring them back to life.

But be warned: once you hear an echo, it's impossible to forget.

Will you take the risk and unlock the power of the Echo Box?