Nici Gregory Books

The Good Little Mermaid's Guide to Bedtime

By Eija Sumner Illustrated By Nici Gregory

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This little mermaid is too FIERCE and SCARY and FEROCIOUS to follow The Good Little Mermaid's Guide to Bedtime . . . well, except the part about snuggling her shark stuffie. A hilarious pictur...

Vampire Jam Sandwich

By Casey Lyall Illustrated By Nici Gregory

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Once upon a time a vampire took a bite of a jam sandwich . . . and a legend was born. Now the vampire jam sandwich roams the streets, looking for MORE JAM. Will yours be next?A hilarious spooky pic...

Oh Monty

By Nici Gregory, Susannah Lloyd

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Oh Monty

By Nici Gregory, Susannah Lloyd

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Where s Speedy

By Nici Gregory

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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.