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Book synopsis

The sun is saved. The microbe is dormant. Kira Reyes is home.

But the universe isn't done with her.

Two years after the ECHO Protocol mission, Kira has built a fragile peace on Earth. She's testifying at the UN. She's rebuilding her life. She's pretending she's still human.

But the frost-scale beneath her skin remembers. The Mercury ping is growing louder. And something ancient is awakening beneath the Caloris Basin.

The Singers are calling.

Deep beneath Mercury's scorched surface lies Substructure 7-the last remnant of the Architects who built the galactic network. Inside, the Singer waits. Its message is urgent: a secondary Strain Echo variant has evolved. Smarter. More adaptive. More intelligent.

And it's waking up.

Corporate wars. Memetic battles. A Choir that must sing.

Dr. Elias Voss believes humanity must remain "loud" and dominant to survive. He'll do anything to control the Singer technology. The Tardigrades-Kira's found family-face internal fractures between cautious elders and eager youth.

And Sparky? The juvenile water bear who declared herself "Kite God" is ready to ascend.

The Bridge must return. The Choir must sing. The galaxy must be saved.

A blend of Andy Weir and Becky Chambers with a dash of Snow Crash. The water bears steal the show.

The Bridge Trilogy continues.

Perfect for fans of Project Hail Mary, The Long Way to a Small, Angry Planet, and Children of Time.

Scroll up and order today.

Book details

• Full title: MERCURY PROTOCOL
• Subtitle: A Hard Science Fiction Thriller : Quantum Choirs, Corporate Wars, and the Bridge's Return
• Author: Carl Wang
• Language: English
• Binding: Paperback
• Number of pages: 334
• EAN: 9798235671591
• ID: 53221315
• Publisher: Carl Wang
• Weight: 389 g
• Dimensions: 216 × 140 × 19 mm
• Date of publishing: 07. July 2026

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