Sylvia Louise Engdahl Books

Enchantress from the Stars

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Three civilizations from different planets in widely varying stages of development clash in what could be either a mutually disastrous or beneficial encounter.

Heritage of the star

By Sylvia Engdahl

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Journey Between Worlds

By Sylvia Engdahl

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Reprint of the 2006 Putnum edition, which was significantly revised from the 1970 edition.

Enchantress from the Stars

By Sylvia Engdahl

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Elana, a member of an interstellar civilization on a mission to a medieval planet, becomes the key to a dangerous plan to turn back an invasion. How can she help the Andrecians, who still believe i...

Journey Between Worlds

By Sylvia Engdahl

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To prove her independence to her boyfriend, Melinda decides to go to Mars on a pleasure trip--an impromptu decision that changes her entire way of life.

Heritage of the star

By Sylvia Engdahl

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The far side of evil

By Sylvia Engdahl

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Enchantress from the Stars

By Sylvia Engdahl

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Beyond th tomorrow

By Sylvia Louise Engdahl

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The subnuclear zoo

By Sylvia Engdahl

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An introduction to high energy physics, including a description of sub-atomic particles and a discussion of current theories in the field and areas for future research.

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.