Unsolved Serial Killer Mysteries of the 20th Century: Investigating History's Most Notorious Cold Cases and the Killers Who Were Never Caught

Some killers were never caught. Some victims never got a name. Some cases are still open today.

From the gaslit streets of 1918 New Orleans to the recent break in the Gilgo Beach investigation, this deeply researched true crime history takes you through more than two dozen of the twentieth century's most haunting unsolved cases — the ones that still keep detectives, historians, and amateur codebreakers up at night.

Inside this book, you'll explore:

The Zodiac Killer's ciphers, letters, and the 2020 breakthrough that finally cracked one of them

The Black Dahlia, the Boston Strangler's disputed legacy, and the Monster of Florence

Lesser-known but equally chilling cases: the Freeway Phantom, the Doodler, the Atlanta Ripper, and the Redhead Murders

How DNA analysis and investigative genetic genealogy are finally cracking cases once thought unsolvable

Why some victims were failed by their own investigations — and what's being done about it

The Gilgo Beach case's stunning 2023 development, decades in the making

A clear-eyed look at true crime theories — including which ones hold up to scrutiny and which don't

Written with careful, respectful research rather than sensationalized detail, this book treats every case — and every victim — with the seriousness they deserve, while giving true crime readers the deep investigative and forensic context they're hungry for.

If you thought you knew these cases, think again. Scroll up and grab your copy today.

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