Ritch Calvin Books

The Merril Theory of Lit ry Criticism

By Judith Merril, Ritch Calvin

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Queering SF

By Ritch Calvin

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Feminist Science Fiction and Feminist Epistemology

By Ritch Calvin

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Gilmore Girls and the Politics of Identity

By Ritch Calvin

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Gilmore girls and the politics of identity

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"This work examines the television series Gilmore Girls from a post-feminist perspective, evaluating how the show's main female characters and supporting cast fit into the classic portrayal of femi...

Feminist Science Fiction and Feminist Epistemology

By Ritch Calvin

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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.