Philip E. High Books

Come, Hunt An Earthman

By Philip E. High

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Sold-For A Spaceship

By Philip E. High

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Humankind survives a nuclear apocalypse, only to find the radiation has made the planet uninhabitable to the worlds brain trust orbiting the planet above.

Speaking Of Dinosaurs

By Philip E. High

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Blindfold From The Stars

By Philip E. High, High, Philip E.

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Twin Planets

By Philip E. High, High, Philip E.

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Twin Planets-- Earth and Firma were mirror worlds. Because they were on a single time-track, Earth was destined to repeat the dangerous history of Firma--which had been stopped in its rotation arou...

These Savage Futurians

By Philip E. High

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Time Mercenaries

By Philip E. High

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Double Illusion

By Philip E. High

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Time Mercenaries

By Philip E. High, High, Philip E.

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Essef - A story of a sea voyage which ended further away in time and space than any of the crew could have imagined when they set out, and of how a group of 20th century sailors saved a future huma...

The Time Mercenaries

By Philip E. High

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Aggression is out of date. After one war scare too many the human has suppressed it aggressive instincts by genetic manipulation. Make love, not war. Now mankind is faced with an enemy so superior,...

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.