David C. Knight Books

Dinosaur Days

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Describes the characteristics of different kinds of dinosaurs explaining their habits and environment and what may have caused their extinction.

Ufos, a Pictorial History from Antiquity to the Present

By David C. Knight

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Discusses unidentified flying objects from ancient times to the present.

Your body's defenses

By David C. Knight

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Describes the body's various natural defenses against diseases and gives hints on how one can reinforce these defenses with rest, proper nutrition, etc.

Best true ghost stories of the 20th century

By David C. Knight

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Stories of unexplained events that baffled psychic researchers, including the Tulip Staircase ghost, the ghosts of Versailles, the phantom of Howley Hall links, and others.

Dinosaurs that swam and flew

By David C. Knight

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Text and pictures describe lesser-known pre-historic reptiles that swam and flew.

The Moving Coffins: Ghosts and Hauntings Around the World

By David C. Knight

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Accounts of incidents in some twenty countries around the world, involving poltergeists, apparitions, and other supernatural manifestations.

The haunted souvenir warehouse

By David C. Knight

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Describes and explains supernatural occurrences in eleven locations around the world.

The haunted souvenir warehouse

By David C. Knight

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Describes and explains supernatural occurrences in eleven locations around the world.

The spy who never was, and other true spy stories

By David C. Knight

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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.