Simon Grennan Books

The invisible city

By Simon Grennan

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Life Is Good in Manchester

By Simon Grennan

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Marie Duval

By Simon Grennan

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"What did it mean to be a woman working in the man's world of cartooning? Marie Duval was a unique, pioneering, innovative, and highly entertaining visual journalist, cartoonist, and illustrator wh...

Parables of Care Creative Responses to Dementia Care

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The School of the Museum of Fine Arts Boston and Grennan Sperandio present art school superstars

By Simon Grennan

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Times Like These...

By Simon Grennan, Christopher Sperandio

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Proceedings Of The American Mathematical Society

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Simon Grennan & Christopher Sperandio present Cartoon hits.

By Simon Grennan

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Drawing in drag by Marie Duval

By Simon Grennan

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"In the collection at Chetham's Library, Manchester, is an illustrated novel, published in 1877. Titled The Story of a Honeymoon, the novel was written and illustrated by Charles H. Ross and Ambros...

The Conversationalists

By Grennan Simon Sperandio Christopher

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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.