The book progresses by first detailing the technological foundations of lighthouses, then examining the lives and work of the keepers, and finally analyzing case studies of maritime incidents where signaling played a critical role. By drawing on archival records, personal journals, and oral histories, Hidden Sea Signals paints a vivid picture of this bygone era.
The book uniquely emphasizes how lighthouse communication formed a sophisticated technological network, essential for maritime safety and global trade, long before modern digital systems.