John Thomas Gillespie Books

Numbers at Work

By John Gillespie

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The Newbery companion

By John Thomas Gillespie

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Characters in young adult literature

By John Thomas Gillespie

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Juniorplots

By John Thomas Gillespie, John T. Gillespie

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Presents summaries of eighty fiction and nonfiction titles for readers, ages twelve to sixteen, with suggestions to use in motivating them to read for pleasure.

Seniorplots

By John Thomas Gillespie

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More juniorplots

By John Thomas Gillespie

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Best Books for Children

By Corinne J. Naden, John Thomas Gillespie, John T. Gillespie

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Best books for children

By John Thomas Gillespie

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Best Books for Children Preschool Through Grade 6

By John Thomas Gillespie, John T. Gillespie

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Best books for junior high readers

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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.