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Murder by Numbers: The 100 Most Prolific Serial Killers Worldwide

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100 Chilling True Crime Cases Featuring The Most Prolific Serial Killers Worldwide

Depending on which definition you read, a serial killer is someone who commits at least two (some say three) murders, in separate incidents, with a cooling off period in between.

Some killers, of course, go way beyond that, evading capture long enough to amass quite staggering victim counts. This volume documents 100 such monsters, serial killers like;

Alexander Pichushkin, a Russian psychopath who set out to murder 64 victims (one for each square on the chessboard) and fell just three short.

Randy Kraft, the “Scorecard Killer” is believed to have killed 67 young men, subjecting them to horrific sexual torture.

Ahmad Suradji, an Indonesian “witchdoctor” who slaughtered at least 40 women in an effort to increase his magical powers.

Dr. Harold Shipman, the world’s most prolific serial killer, suspected of over 250 murders.

David Simelane, a horrific rape slayer who terrorized the tiny kingdom of Swaziland, brutally strangling as many as 45 women.

Coral Watts, a psychopath known as the Sunday Morning Slasher, suspected of over 80 murders in Texas and Michigan.

Irina Gaidamachuk, a unique female serial killer who bludgeoned 18 elderly victims to death to fund her boozing binges.

The Lainz Angels of Death, a quartet of medical monsters suspected of murdering over 300 elderly patients.

Zhang Yongming, a Chinese cannibal who kept a jarful of human eyeballs in his home.

Luis Garavito, horrendously depraved torture slayer of up to 400 boys aged 8 to 12.

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Plus 90 more sensational true crime cases….Scroll up and grab a copy today.


Book Series by Robert Keller

Most of my works cover serial killers, while the “Murder Most Vile” series covers individual true crime stories. These are the main collections;

American Monsters 50 American Serial Killers You’ve Probably Never Heard Of Murder Most Vile Human Monsters British Monsters Australian Monsters Canadian Monsters German Monsters Cannibal Killers Plus various other standalone books, including the The Deadly Dozen, which is available as a free download on Amazon, and Serial Killers Unsolved, which you can get for free when signing up to my mailing list.

Robert Keller’s True Crime eBook Categories:

Serial Killers True Crime Serial Killer Biographies Murder and Mayhem True Murder Cases Serial Killer Case Files True Crime Short Stories

486 pages, Kindle Edition

First published November 2, 2014

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About the author

Robert Keller

353 books116 followers

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Displaying 1 - 3 of 3 reviews
Profile Image for Bettye McKee.
2,190 reviews157 followers
December 1, 2016
Plenty of cases to delight true crime fans

I enjoyed reading this countdown of the 100 most prolific serial killers in the world. Apparently these are fairly recent murderers whose crimes can be verified, and megamonsters such as Countess Bathory and Vlad the Impaler are not included.

If I had proofread this book, I would have made 84 corrections.
Profile Image for Robin Morgan.
Author 5 books287 followers
December 1, 2017
I read this book via an Amazon-US KINDLE Unlimited download.

We’ve all seen and read countdowns for best/worst of for a myriad of miscellaneous topics, from movies to songs to hamburger joints to places to visit, with each countdown consisting of 100 items. But the worst countdown, a countdown no one really wants to deal with, or know about. In this book, the author, Robert Keller, gives his readers 100 of what he feels are the deadliest serial killers from around the world.

Mr. Keller presents his readers with a book which has been organized from the least deadly serial killer to the worse, in a table of contents that allows readers to read this book in a typical countdown manner or to skip around. The table of contents itself lists these heinous individuals according to the number of victims they’d murdered, their names and the country where their horrific murders took place.

While some of the individuals in this book are quite infamous like the United State’s Ted Bundy and Jeffrey Dahmer, others didn’t manage to gain any attention and literally flew under the proverbial radar.

One of the things which can make or break a book like this is the writing of the author, which I felt had been rather engaging. Mr. Keller takes the research he’s done and gives his readers the essence of the wickedness which made these individuals tick, in an easily understandable manner that is essential in dealing with this topic.

Given the above, this reviewer is happy to give this author 5 STARS for the dedicated work he’s put into this book.
5 reviews
January 10, 2026
captivating!

A great read! This is my favorite author for true crime books. He never fails to disappoint. I can’t wait to read his next release!
Displaying 1 - 3 of 3 reviews

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