What would it mean to listen for voices from other worlds? SETI and the Search for Extraterrestrial Intelligence offers a riveting, accessible tour of humanity’s most famous quest. Through the lens of Breakthrough Listen—the largest, most comprehensive effort to scan the skies for technosignatures—this book unpacks how scientists search for hints of technology across vast radio frequencies, and why narrowband signals remain a guiding beacon. You'll discover how researchers decide what to listen for, how telescopes around the globe work together, and how data becomes knowledge from raws to spectra, from noise to signals with potential meaning. Follow the real-world drama of sifting through terrestrial interference, calibrating instruments, and applying robust thresholds to separate credible candidates from false alarms. Learn what non-detections teach us about the cosmos, and how scientists interpret the possibility that civilizations might be rare, fleeting, or hidden. The journey covers not just radio, but the next generation of observatories, open science, and the promise—and the limits—of searching for other minds. It explores notable candidates, the chase to verify them, and what a true detection would reveal about technology, biology, and civilization itself. It also invites readers to consider how discoveries would be communicated to the public, and why transparency matters as we chart new frontiers. Accessible, thought-provoking, and thoroughly grounded in current science, this book is ideal for curious minds, students, and science lovers who want a clear map of how we listen to the cosmos—and what we might hear when we finally tune in. Get ready to expand your perspective on humanity, the universe, and our place within it. Turn the pages and join a community of readers who wonder what lies beyond the next quiet frequency.