Gregor Hartmann Books

UNIVERSE 1

By Augustine Funnell, Barry N Malzberg, Scott Baker, James Patrick Kelly, Ursula K. Le Guin, Paul Di Filippo, M. J. Engh, Jamil Nasir, Bruce Sterling, Kim Stanley Robinson, Gregor Hartmann, Robert Silverberg, Stoney Compton, Geoffrey A. Landis, Grania Davis, Karen Haber, Richard Rein Smith, Francis Valry, Leah Alpert, K. Hernndez-Brun, Damian Kilby, John M. Landsberg

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An extraordinary collection of original fiction by science fictions most talented writers. Until Terry Carrs untimely death, his Universe series was acknowledged by critics and readers alike as the...

Universe 1

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How To Prepare For The S.P.L.A.T.

By Gregor Hartmann

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A classic send-up of the world of standardized testing for college admissions.

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.