Harry Devlin Books

What kind of a house is that?

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Full-page color drawings accompany brief histories of various buildings, from fun house to outhouse, demonstrative of nineteenth-century American architecture and society.

Old witch and the polka-dot ribbon

By Wende Devlin

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When the kitchen is finally empty, Old Witch makes her own magic nut cake to enter in the carnival's cake baking contest.

Cranberry Christmas

By Wende Devlin, Harry Devlin

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Cranberry Thanksgiving

By Wende Devlin, Harry Devlin

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Portraits of American architecture

By Harry Devlin

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How Fletcher was hatched

By Wende Devlin, Harry Devlin

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Feeling his mistress has rejected him in preference to her newly hatched chicks, the old hound dog decides he must hatch from an egg and learn to say "peep" to regain favor.

A Kiss for a Warthog 30th Anniversary Edition

By Wende Devlin, Harry Devlin

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If the warthog destined for the Oldwick zoo had not had a mind of her own, the rival towns of Oldwick and Quimby might never have become friends.

Cranberry Halloween

By Wende Devlin, Harry Devlin

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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.