Keller, Robert Books

Expert Systems Technology: Development And Application

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

Practice Of Structured Analysis: Exploding Myths

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

The Deadly Dozen

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

The Shocking True Crime Stories of the 12 Worst Serial Killers in American History David Berkowitz: Known as the "Son of Sam," Berkowitz was a deeply disturbed young man who prowled the streets of...

Vorvertragliche Schuldverhältnisse Im Verwaltungsrecht: Zugleich Ein Beitrag Zur Rechtsverhältnislehre

By Keller, Robert, Robert Keller, Robert Keller

Average: 0.00, 0 Ratings

Jahrzehntelang hat die Verwaltungsrechtswissenschaft gegenüber dem Rechtsinstitut des Vertrages eine reservierte Haltung eingenommen. Hier hat sich erst in jüngerer Zeit ein Wandel vollzogen. Die m...

Unhinged

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

The Shocking Story Of The Real-life Killer Who Inspired Psycho, The Texas Chainsaw Massacre And The Silence Of The Lambs. To The People Of Plainfield, Wisconsin, Ed Gein Was A Lonely Old Bachelor,...

True Crime: Australian Monsters

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

The Shocking True Crime Stories Of 24 Australian Serial Killers, Including; Ivan Milat: Arguably Australia's Most Notorious Serial Killer, Milat Was Convicted Of The Rape, Torture And Murder Of Sev...

50 American Serial Killers You?Ve Probably Never Heard Of

By Keller, Robert, Robert Keller

Average: 0.00, 0 Ratings

At any given time there are between 30 and 50 serial killers roaming the streets of America. These are their stories. 50 shocking true crime cases, including; Alfred Cline: A prolific "Bluebeard" s...

Deadly Women Volume 8: 20 Shocking True Crime Cases Of Women Who Kill 8

By Keller, Robert

Average: 0.00, 0 Ratings

20 Shocking True Crime Cases of Women Who Kill, includingBeth Carpenter: When a male stripper turns up dead, the last person you’d suspect is an up-and-coming young lawyer.Penny Bjorkland: A demure...

Deadly Women Volume 8: 20 Shocking True Crime Cases Of Women Who Kill 8

By Keller, Robert

Average: 0.00, 0 Ratings

Unexplained Book 2: 16 Baffling Unsolved Mysteries 2

By Keller, Robert

Average: 0.00, 0 Ratings

16 Baffling Mysteries That Have Never Been Solved, including; The Higher You Fly : One of the world’s wealthiest men vanishes from his private aircraft during a flight. Accident, suicide, or murde...

How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.