Michael’s Search for a Signal
The Passage (Justin Cronin Edition)This thread follows Michael’s forbidden radio work from the discovery of an old logbook to the signal that points toward Amy’s origins.
increasing
Bearing strength in each event
decreasing
The Battery Problem

The Battery Problem
A hidden failure
Michael discovers that the Battery Stack is deteriorating and that the lights may fail within a few years. The Colony’s central defense has a finite life.
Silence as policy
He tells Theo but keeps the news from the Household, fearing that people would lose hope without any solution. The secret makes Michael both engineer and reluctant keeper of despair.
Rex Fisher’s Logbook

Rex Fisher’s Logbook
A forgotten record
Michael discovers a notebook written by Rex Fisher, filled with radio frequencies and reports from distant places. Its entries end when transmissions are ordered to cease.
Hope becomes practical
The logbook proves the Colony once heard from others. With Elton’s help, Michael begins rebuilding a receiver, hoping to locate any surviving settlement.
The Ghost Signal

The Ghost Signal
A signal repeats
Michael detects a faint digital transmission at a regular interval. Its unusual frequency and strength suggest a military device moving closer or transmitting from somewhere nearby.
A connection to Amy
He traces the signal to the device in Amy’s neck and retrieves its stored data. The hidden record points back toward the beginning of the viral crisis.
The Message Decoded

The Message Decoded
A century of readings
Michael calculates that Amy’s device recorded her vital signs for more than ninety-three years. Its data identifies her as a child subject from the Colorado quarantine zone.
An invitation endures
The old beacon still transmits, asking anyone who finds Amy to bring her to Telluride. The message turns the journey into a response to a call from the past.
The Lights Go Dark

The Lights Go Dark
A missing circuit
The Colony’s lights fail even though Michael finds no ordinary fault in the system. The blackout allows the virals to cross the Wall and changes the community’s future in minutes.
An answer beyond repair
Afterward, the battery system remains active but no longer serves the Colony. Michael’s long search for a signal has led away from repair and toward the people who may explain what happened.
About a year before the Colony’s fall
Several days after Michael tells Theo
After the Walker reaches the Colony
After the Haven escape
During the Night of Blades and Stars